When I ordered mine last year I followed the following:-
1. http://www.signdezine.co.uk/vinyl_gr...gn-wheelcenter
2. From here select the size.
3. CUSTOM FILE NAME - MR2Screaming-chicken-Chrome-on-black-1
4. Leave the QUANTITY at 1 (this is a set of 4).
5. Add to cart
Obviously you can ask for the colours to be changed if you need.
For my Borbet As I got 60mm made up, which fits just perfect.