Original License plate replacements?

so is there a legal ramification if i were to either have 63 duplicates made with my current license number or repainting the current plates(not sure that would work)? Other than that I have the original sales receipt of the car, but over the years I'm not sure how the registration is. there was a number of swaps, possibly license plates between my 63 four door and a 64 two door that we had. I'm street legal and all, but was curious about getting the black and gold plates for the car.