One of the best is Rich Art - he dose many of the top racers;
http://www.richartconcepts.co.uk/wide.html There are many others too;
This site has many ideas and a template too;
http://www.gremlindesigns.co.uk/gallery1.html I know of at least another 7 airbrush artists in the UK (with web presence) if you're interested.
Tim