This is for a PC3LE. I went off and researched this, and when I came back, I realized that maybe my answer is for a different question... sorry if it is.

Here's a list of programs in the Organ category which do not use KB3:

Type         ID   Object Name
Program     184   VAST1-3,8&9
Program     365   GarthsLastWaltz
Program     681   Mangled Kit
Program     774   OrganWaveComper
Program     924   Wah B3+Echoplx
Program     959   VAST1-3Ch/Perc
Program     960   VAST1-3 Ch/Perc2
Program     961   Fisher's VAST B3
Program    4112   Drawbar Organ
Program    4113   Perc Organ
Program    4114   Rock Organ

Daniel Fisher's B3 was meant to simulate a B3, with MIDI controls for each drawbar; that's Program 961 I suppose.
https://www.sweetwater.com/k2000/sw-k2b3/

To get more non-KB3 organs, maybe load up some programs from the K2000 factory and farm collections?
http://kurzweil.com/product/k2000/downloads/
I've trimmed the lists to show interesting names only:

FARM/ROMPIXA.KRZ
Program      276   624 Perc Organ 2500
Program      277   424 Ballad Organ 2
Program      278   586 Gospel Organ
Program      279   608 Drive Organ
Program      280   590 Rotating B's&M's
Program      281   248 Cheeze

K2000/K2KFARMF/ORGANS.KRZ 
Object-Type + ID  Size Object-Name
Program      200   602 Ballad Organ 2pr
Program      201   424 Ballad Organ 3
Program      202   424 London Hammond
Program      203   426 London Hammond 2
Program      204   420 Drive Organ
Program      205   422 Drive Organ 2
Program      206   588 Rotating B&M's2
Program      207   584 Perc Organ
Program      208   622 Clav Organ MW
Program      209   626 Bee 3
Program      210   662 Tamborgan #2
Program      225   426 Organ 1(Drawbar)
Program      226   456 Organ 2
Program      227   424 Organ 2 (Perc)
Program      228   716 Mello Perc
Program      234   460 Organ Pad 2
Program      235   600 Organ 3 (Perc)
Program      236   596 DrawbarPerc
Program      237   618 Diver
Program      238   620 Diver 2
Program      239   620 Diver 3
Program      240   622 Driver 3

FACT/V1PSET2.KRZ
Program      228   628 B-2000

FACT/VIDEO.KRZ
Program      298   426 Tone Wheel Organ

FACT/XPROGS5.KRZ
Program      260   658 60's Hammond

FACT/XPROGS7.KRZ
Program      219   472 HAMMOND JAZZ 1
Program      220   472 HAMMOND JAZZ 2

Back to the PC3LE:

Here's a list of all programs in the Organ category, with KB3 status shown. From what I've seen, if a program uses KB3, it's in the Organ category.

Type         ID   Size Num Category    Name
Program      49   1324   1 Organ   KB3 Gregg's B
Program      50   1320   1 Organ   KB3 Real AllOut B
Program      51   1320   1 Organ   KB3 Clean Perc
Program      52   1324   1 Organ   KB3 The Ninth Bar
Program      53   1320   1 Organ   KB3 Lord's B3 MW
Program      54   1320   1 Organ   KB3 OleTime Gospel
Program      55   1348   1 Organ   KB3 FooledAgnVox
Program      56   1328   1 Organ   KB3 BostonScreamer
Program     177   1796   4 Organ       ParisCmboAccordn
Program     178   1324   1 Organ   KB3 WhiterShadeB3
Program     179   1324   1 Organ   KB3 Doors Vox
Program     180   1332   1 Organ   KB3 Indagardenoveden
Program     181   1328   1 Organ   KB3 Animals  Vox
Program     182   1308   1 Organ   KB3 Magic Wolf
Program     183   1324   1 Organ   KB3 Farfisa 1
Program     184   1732   4 Organ       VAST1-3,8&9
Program     343   1460   3 Organ       OrganMode Pn/Hrp
Program     345   1808   4 Organ       Phase sw Organ
Program     365   1500   3 Organ       GarthsLastWaltz
Program     486   2396   6 Organ       Pipe Stops
Program     487   1692   4 Organ       Soft Stops 
Program     488   1396   3 Organ       All Stops 
Program     489   1724   4 Organ       Chapel Organ
Program     490   2380   6 Organ       AllStops AllVox
Program     774   1460   3 Organ       OrganWaveComper
Program     795   1064   2 Organ       16' Open Flute  
Program     796   1060   2 Organ       16' Stop Flute
Program     797    744   1 Organ       16' Diapason
Program     798    744   1 Organ       16' Ped Bourdon
Program     799    748   1 Organ       16' Ped Diapason
Program     800    744   1 Organ       16' Ped Reed 
Program     801    740   1 Organ       16' Reed A
Program     802    740   1 Organ       16' Reed B
Program     803    740   1 Organ       16' Gamba  
Program     804    744   1 Organ       16' DiaCeleste
Program     805    748   1 Organ       16' Ballpark Sto
Program     806    740   1 Organ       16' Viol 
Program     807   1060   2 Organ       8' Open Flute  
Program     808   1060   2 Organ       8' Stop Flute
Program     809    740   1 Organ       8' Diapason
Program     810    744   1 Organ       8' Ped Bourdon
Program     811    736   1 Organ       8' Reed
Program     812    740   1 Organ       8' Gamba  
Program     813    744   1 Organ       8' DiaCeleste
Program     814    748   1 Organ       8' Ballpark Stop
Program     815    740   1 Organ       8' Viol 
Program     816    748   1 Organ       51/3' Ped Bourd.
Program     817   1060   2 Organ       4' Open Flute  
Program     818   1060   2 Organ       4' Stop Flute
Program     819    740   1 Organ       4' Diapason
Program     820    744   1 Organ       4' Ped Bourdon
Program     821   1052   2 Organ       4' Reed
Program     822    740   1 Organ       4' Gamba  
Program     823    744   1 Organ       4' DiaCeleste
Program     824    748   1 Organ       4' Ballpark Stop
Program     825    740   1 Organ       4' Viol 
Program     826   1064   2 Organ       2 2/3' OpenFlute
Program     827   1064   2 Organ       2 2/3' StopFl 12
Program     828    744   1 Organ       2 2/3' Diapason
Program     829    740   1 Organ       2 2/3' Reed
Program     830    744   1 Organ       22/3' Gamba  
Program     831    748   1 Organ       2 2/3' DiaCelest
Program     832    748   1 Organ       22/3' Ballpark S
Program     833    744   1 Organ       2 2/3' Viol 
Program     834   1060   2 Organ       2' Open Flute
Program     835   1060   2 Organ       2' Stop Flute
Program     836   1056   2 Organ       2' Diapason
Program     837    736   1 Organ       2' Reed
Program     838    740   1 Organ       2' Gamba  
Program     839    744   1 Organ       2' DiaCeleste
Program     840    748   1 Organ       2' Ballpark Stop
Program     841    740   1 Organ       2' Viol 
Program     897   1312   1 Organ   KB3 Ezra's Burner
Program     898   1312   1 Organ   KB3 HotTubeGospel
Program     899   1320   1 Organ   KB3 B3 Midrange
Program     900   1312   1 Organ   KB3 Blues&Gospel
Program     901   1312   1 Organ   KB3 Prog B3 Perc2
Program     902   1328   1 Organ   KB3 Prog B3 Perc3
Program     903   1312   1 Organ   KB3 Tube B3 Perc
Program     904   1324   1 Organ   KB3 Prog B3 Perc4
Program     905   1312   1 Organ   KB3 BrgtTubeScream
Program     906   1316   1 Organ   KB3 Zepelin Solo
Program     907   1320   1 Organ   KB3 Argent B3
Program     908   1316   1 Organ   KB3 MusselShoalsB3
Program     909   1328   1 Organ   KB3 XtremTubeB3Prc
Program     910   1324   1 Organ   KB3 Classic Traffic
Program     911   1316   1 Organ   KB3 Warm B3
Program     912   1320   1 Organ   KB3 Warmer B3
Program     913   1316   1 Organ   KB3 ChrsEchoOrgan
Program     914   1316   1 Organ   KB3 SlowPhaseOrgan
Program     916   1324   1 Organ   KB3 Lord'sDirtBomb
Program     917   1312   1 Organ   KB3 Mellow Mitch
Program     918   1328   1 Organ   KB3 Sly's Revenge
Program     919   1324   1 Organ   KB3 LateNighter
Program     920   1320   1 Organ   KB3 FirebreatheC3
Program     921   1308   1 Organ   KB3 Mr Smith
Program     922   1308   1 Organ   KB3 Errol G.
Program     923   1308   1 Organ   KB3 Testify
Program     924    804   1 Organ       Wah B3+Echoplx
Program     925   1320   1 Organ   KB3 Sweet n Nice
Program     926   1308   1 Organ   KB3 Soft Chords
Program     927   1312   1 Organ   KB3 SputtringingB3
Program     928   1316   1 Organ   KB3 Melvin C.
Program     929   1308   1 Organ   KB3 All Out
Program     930   1308   1 Organ   KB3 J's Comper
Program     931   1312   1 Organ   KB3 Brother Jack
Program     932   1324   1 Organ   KB3 Model One
Program     933   1324   1 Organ   KB3 Thick Gospel
Program     934   1316   1 Organ   KB3 Growler B
Program     935   1312   1 Organ   KB3 Ready 2 Rock
Program     936   1344   1 Organ   KB3 Thimmer
Program     937   1336   1 Organ   KB3 The Real ABC
Program     938   1336   1 Organ   KB3 GospelSpecial
Program     939   1344   1 Organ   KB3 In The Corner
Program     940   1332   1 Organ   KB3 NightBaby
Program     941   1344   1 Organ   KB3 Gimme Some
Program     942   1332   1 Organ   KB3 The Grinder
Program     943   1336   1 Organ   KB3 Mean Bean
Program     944   1340   1 Organ   KB3 Dew Dropper
Program     945   1328   1 Organ   KB3 Two Out
Program     946   1340   1 Organ   KB3 J's All Out
Program     947   1332   1 Organ   KB3 My Sunday
Program     948   1344   1 Organ   KB3 Good Starter
Program     949   1336   1 Organ   KB3 Sacrificer
Program     950   1336   1 Organ   KB3 LeeMichaelsB3
Program     959   1744   4 Organ       VAST1-3Ch/Perc 
Program     960   1748   4 Organ       VAST1-3 Ch/Perc2
Program     961   7416  21 Organ       Fisher's VAST B3
Program     970   1104   2 Organ       Blues  Harmonica
Program     981   1692   4 Organ       Bass Pedal 
Program    4112   1432   3 Organ       Drawbar Organ
Program    4113   1428   3 Organ       Perc Organ
Program    4114   1748   4 Organ       Rock Organ
Program    4115   1432   3 Organ       Church Organ
Program    4116   1112   2 Organ       Reed Organ
Program    4117   1432   3 Organ       GM Accordion
Program    4119   1112   2 Organ       Bandoneon

HTH!

Wow, thank you, I´ll try it.