I think it's 38-7777 for a set of 4 at $89.95 or 38-7778 each at $29.95 but they are definitely the oval hole and from the pictures appear different. If these are the ones they appear to be repop for the GM 15 X7 ralleys like on the 69 Z/28, I think I have some original trim rings for those and they have different rim ridges.

I would really like to hear the follow up from 62max on the specifics of "cant tell them apart". I cant image we would all be draggin this out if it was a $90 fix. I guess I'm gonna have to order a set and do a side by side, worse case is I have a decent set for my RS/SS.