Sounds kind of funny, but there is a British parts supplier that sells them and a whole host of AC/Shelby stuff.
They do have a web site but it does not list all their products. cobraspares.com (a co-company of eurospares.com)
I have ordered from their catalog and they have great customer service, but you have the hassle of significant time zone change, a funny phone number, and that damn accent.
Currency is not a big deal, pay with a charge card and you will have the up to the minute exchange rate.
The whole thing was kind of a hoot, actually. So if you don't mind a little adventure to get the badges, give them a try.
-John