I agree, the repros out there suck...or at least the last time I tried to fit one, which I will admit has been awhile. I have a 69 Camaro and I have 3 of the 4 needed in original GM wheel wells, one of which has not been easy or cheap to get. If anyone has a passenger rear and would like to part with it, please email me. I am willing to pay for it and don't expect it cheap. Also, if anyone needs a GM driver side rear, I have an extra and would sell it to a needy party.
I agree I installed a set on my car they seemed like they were made if thick tinfoil. Of course I foolishy tossed my old ones knowing I was getting new ones. A lot has been learned about after market parts. At first I didn't get it, but now only original is the way to go. Only one or two of the front holes lined up. They also have a very cloudy finish, Even my originals were brighter, probably because the originals were stainless. Live and learn as they say.