Heres a link to their site.
These wheels aren't cheap, but compare these prices to Halibrands. I run 16" Compo's on my Excalibur (9.5" in front and 10" rim width in back). The "spinner" (for that "authentic" look) is held on with allen screws. My five bolt wheel pattern is the same as Mustang wheels. When racing I remove the Compos and bolt on "Ford" wheels/tires.
http://www.comp.co.uk/flash.htm
USA site:
http://www.usacomp.com/
Roughly: Halibrand $760 per wheel
Compo's $450 per wheel
Ernie