I'm looking to remove and clean up the top stainless trim piece on the back of my 66 Coronet 440 deck lid. It appears to be held on by two studs and nuts (at either end which you can see and handle easily) plus five plastic push pins of some kind. I can see a small white plastic push pin coming through inside the deck lid. I'm hesitating in removing the trim piece because I am sure some of the plastic pins will break and possibly even the end studs may break as they are rusty. Where can I find these plastic push pins and possibly studs that fit into the trim moulding? Thanks!