There are new higher quality quarters now being produced. Coupes are in some limited availability and converts in the near future. I picked up a coupe right quarter recently and it is currently in a resto shop for installation on my convertible. I took some pictures yesterday that I will be posting on my webpage next week sometime. The initial words from the body man in the shop is that the stamping is not too bad.
I had heard bad things about repro skins, the old full quarters and even modifying NOS Camaro quarters for our cars. So I hope this works out. So far, it looks like it will be very good.