MX5 gleneagles - wheel centres - Brad

Had the wheels refurbished and they look great. In the process the centres disappeared. I wasn't worried as they were 4 random ill fitting things. I thought I'd pick some up dead easy but a year later I still haven't found any. All the specialist parts people say they don't exist. One went as far as to say look for a plastic tube that has a top the right size (50mm) and cannibalize it to fit... Ebay turns up everything except what I need.

Does anyone in this expert forum know where I can get four 50mm plastic wheel centres. The logo is irrelevant - I can manage the decorative bits.

Thanks

PS Do I need centres? Is the open air and the open road going to damage the wheels?

Edited by Brad on 08/04/2010 at 16:47