I am using the Wheel Vintiques Chrysler trim rings on 15x7 Ralleys on the front and 15x8 Ralleys on the back.

They fit the 15x7 with no gap and there is a small gap with the 15x8.

I don't know how faithfully they are to the original OE trim rings, those things don't concern me. I actually like the look of the generic trim rings they sell but because of the depth of the step in the Ralley wheel rim the non Chrysler style would not even attach to the 15x8 wheel.