Found this website and the quality is good. I bought a set off e-bay and they were very poor.
The good site is [url="http://www.auto-motif.co.uk/system/index.html"]Auto Motif[/url]
Avoid this guy on e-bay [url="http://www.stores.ebay.co.uk/id=76040021&ssPageName=L2"]EBay shop[/url]
The centres from Auto is resin coated (silver background & black logo)
The centre from ebay is stickers (silver background & black logo)