Well i was checking our shops for new center caps for my aftermarket rims since mine were faded and falling apart, well the cheapest i could find was well over 50$ for 4 so I decided to make my own. I measured the hole of the rim and it was 2" I did my friends honda also because he was missing his and he has 2.5". So i went to walmart and got a set of floor protector pads which were $2.50 for 4.

Scuffed them and painted them black
Alittle superglue