I've got T50 rebuild kits available for sale. Also included are the bushings/washers for your shifter. $USD400 delivered to North America.
Note: There are 3 types of T50 gearboxes. Be sure that your input shaft bearing is the 68mm bearing (normally designated as Nachi 30RT06). Remove your gearbox clutch release bearing housing to get a look at the front input shaft bearing. If your gearbox was released on an AE86 from 1983 onwards, more than likely you will have the 68mm bearing.
Whats included in the kit:
1x Front - Input shaft bearing (Nachi Japan)
1x Rear - output shaft bearing (NSK Japan)
1x Centre - output shaft bearing (Koyo Japan)
1x Front - Countershaft bearing (Koyo Japan)
1x Centre - Countershaft bearing (Koyo Japan)
1x Rear - Countershaft bearing (Koyo Japan)
12x Needle roller bearings (Not pictured)
5x Synchros - Reverse has no synchro (Aftermarket)
2x Oil seals (Front input shaft & Rear output shaft - Toyota OEM)
1x Shifter bushing (Toyota OEM)
1x Shifter washer (Toyota OEM)
1x Shifter Ball rubber cup washer (Toyota OEM)
The paper gasket kit is omitted from this kit as they are prone to leaking. I've had better luck using Permatex or RTV silicone.
Heres a picture of the kit (Minus the needle rollers):
Lastly, if you need individual bearings/parts contact me. I will separate the bearings/synchros etc.
Send me a PM, or if you like you can send me an email: haxengineering@gmail.com
Cheers,
Will