Shameless plug, but I have just put my set of Cosmic 12" Alloys (very rare fiat 4x98 fit) up on the "For Sale" section of the site.
http://club126uk.co.uk/smf/index.php?topic=3414.0I understood that the Mini PCD was 101.8. The advice I had from a friend of mine who runs a large tyre and wheel supplier was that this is too larger difference for the wobbly bolts to be safe, they use them for fitting VW 4x100 pcd wheels onto Fiat 4x98 hubs ( a difference of 2mm rather than almost 4mm with the mini rims).
Also in most parts of Europe they are banned as they are believed to be dangerous – not that I agree with that as long as they are used within the tolerances that they are designed for (this needs checking before use).
I am replacing my Cosmics with Revolutions, but have been watching ebay for a couple of years for a pair of 6 inch for the front, since I bought a pair of 7 inch rears (1284cc and with a bit of luck over 110 bhp), I finally found a pair before Christmas.
Nigel