Where to buy Circuit Board replacement

I have two controllers that have somewhat broken circuit boards and was wondering if there is anywhere to buy just a circuit board or a way to fix them.

The problem is that either the analog stick or the control stick is very lose and is constantly tilted in a certain direction from over use and abuse. I tried disassembling and cleaning but that doesn't help as the stick the the plastic nubs attach to on the circuit board are the actual problem as they are lose. also I've tried just using other circuit boards but the colour of the plug on the end isn't the same as my orange or purple controllers and i was wondering where i would find the same colours or how to fix mine.

thanks for any help