Wanted to buy from forum vendor but no luck finding it. They all keep coming up with window trim Where do you guys normally go for these kinds of parts? Car is new to me, 2012 mustang GT premium. Side note, kinda clunk noise going over bumps sounds like towards rear end. Is this probably LCA bushings? Thank for any input.

 

Search, Ford factory replacement parts. That should get you something to check out.

The clunk sound could be LCA bushings or sway bar end links.

I'm no expert but these would be where i would start.