Thanks for the last link Roy - it seems they will fit fine. They're not Fuchs though - they're some rather nice custom built three-piece split rims. I've checked and they weigh about the same as Fuchs. They're BBS style and I'm hoping to get them anodized or powder coated in black or dark gun metal grey.
Here's a link...
http://www.imagewheels.co.uk/pages/dm_page.html