where can i find transmission parts.
1992 Nissan maxima se 5 speed LSD.
Bearing , sychron, seals gasket. I found a Machanic that would do it for me for $250 labor

 

google.com

find out what is he actually replacing for $250 labor. he won't know what exactly you need until the case is cracked open. if the guy is a skilled rebuilder he should know what you should get and where to get it from.