I had my wheels machined out to clear my hubs. Since they started at 73.1mm and then necked down to 2.5", I just had them machined straight through at 73mm.
I found I could run this cap on my rims. It sticks out a little bit, but it covers everything.
Ultra Wheel Center Caps 89-8059S
View attachment 1715334957
Initially I just painted them silver to match the rims. Then I managed to find a generic wheel cap that fit my RPF1's, so I used it in the rear and then cut the front cap down and JB welded the wheel cap onto the cover...
Rears with generic cap
View attachment 1715334958
Fronts with cut down metal cap painted to match the rim,and the generic cap JB welded to it
View attachment 1715334959
You could also just use the push through wheel caps by themselves and paint them to match your wheels. I'm sure you could find a smaller diameter cap for the rears to look similar.