broken plastic wheel covers

On my cougar the plastic wheel covers (bolt) on have at least on one side failed around the screws and partially ripped off the tt on my last trip. So I contacted the dealer and Keystone for replacements and I can get them but each are $60 bucks, plus they want a mind blowng $50 at Keystone to package them and it’ll be $50ish to ship. Oh to top it off they are white and unpainted.

So my question is has anyone done diamond plating or something else as a replacement?