Is there anywhere it's possible to find replacement parts for this?

I've taken these controllers apart to swap some parts, namely the conductive pads for the face buttons, from old controllers to newer ones. Problem is that I don't have any one unused ones I haven't already done this to and I need to swap out the face buttons pads again. I can't find anywhere that sells the part since it's different from the official switch pro controller, and pdo support hasn't responded to my inquiry in over 2 weeks.