As suggested by chas10e.
Post your parts needs here. Missing a rubber boot from a 2600 joystick? A salvaged joystick port? A left handlebar grip from Atari Stunt Cycle? A TI 99/4A motherboard? A cartridge shell? I'll bet someone here has it!
After all, what's better than taking spare parts and rescuing a broken console or controller and sparing it from the trash? Nothing, that's what!
The rule is simple...post your needs, and if someone has the part...a fair price, trade, or even just donating is all good. No price gouging please.