Kelsey steel wheels 15x7 are off of what?

Wheels are mid 80s JJ 15x7 Steelies of diplomats and 5th aves
The caps are for all kinds of factory aluminum wheels from the 80s the only difference between the caps would be the car they are off of. Like CMX wheels have different top portions and so do other wheels

I have been lookin for a decent set of caps and they are hard to find