The Z32 NA and TT manual transmissions have the same/similar internals to the RB25DET manual tranny...the RB25DET wasn't available until the Skyline R33 (GTS-T).
The Kameari ad says "Skyline GTS (R32)". There were a few different R32 GTS models available, so it could either be an RB20DE, RB25DE or RB20DET (not sure if all three differ from each other or not, or which US model transmissions they are similar to).
I remember reading that the Silvia transmissions (SR20DET S13/S14) internals are the same/similar to the KA transmissions.
Check out this thread that talks about the RB20, RB25, and SR trannies (also includes a link to Dave's SR to L tranny swap writeup):
http://forums.hybridz.org/showthread.php?t=111094&highlight=sr%2A
Hope that helps.