I bought a pre 95 transmission to fix the stripped output shaft when I rebuilt my "bought it in a bucket" 95 KDX 200. I don't have all my notes handy, but about half the transmission parts were the same (including the output shaft).
I probably have the rest of that pre 95 tranny in a box in the garage somewhere, if a part of it will help anyone with a pre 95 bike (but won't fit my 95), email me at bill at kilgallon family dot com and I'll try and dig the parts out and make you a deal you can't refuse. :)