Mike, you still have to remember they NEVER came that way from the factory.
Its kinda like buying a new ford and the dealer sends it out to get different rims or diamond deck tool box or what ever they do these days. It is period (time) correct but didnt come from the factory.
Example are the fender skirts on my truck . They were made in the 50's for these trucks by an aftermarket supplier so they are period correct, just not from the factory.
Kevin S in Akron, Ohio