Where can I find this part? (Window Switch)

Hello! I have a 2012 Chevy Malibu LS, and the switch for the driver's side window crapped out on me yesterday. I cracked it open today, and saw a bunch of black stuff (probably plastic being worn away) all inside of the switch, and one of the posts on the plastic part of the switch was broken off. Every other switch was fine, and clearly mine was fine, with the exception of that piece. I'd like to just buy the plastic, so I don't have to spend $40 on the entire assembly but am having trouble locating it. Would anyone happen to have a good resource, or know any tips to salvage the one I have?

https://imgur.com/a/9rNNKiq