I personally had a (real) copper Arizona plate, but it corroded badly.
I remember when I lived in Montana buying a foreign car that only seemed to have a place to install one plate. So I displayed the other one in the window. The patrol got very upset about this. It was even hard to get your hand up in there to fasten the plate. I think somebody helped me with it finally but the dealer should have done it before I left the lot. Now I am wiser and would ask them to do so.