Is it possible to buy genuine centre caps at a reasonable price? I've seen some that are possibly genuine for £12 each which seems extortionate. It seems to be impossible to buy on eBay, though, as they all claim to be genuine and most of them are cheap fakes.
I actually currently have a set of the fakes fitted because they still look better than old white worm ones. I had to use tape to pad them out as they're too small and don't fit properly as they are. Maybe these ones will last a while but I doubt it so might have to get real ones eventually.