You are probably not going to find an exact match. Mopars always use a stepped edge ring , never a smooth ring. Also the 15 inch version
used a small dime sized valve stem hole. The 14 inch used a much larger valve stem hole , rounded top and bottom , straight on the sides.
I have a couple 14 inch polished rings , but they dont match the polished 15 inch rings the Coker has , valve stem hole is different.
As I say an exact match , probably not, close , maybe.

Frank