I own a laser engraver and have made a lot of nice plates for different cars, etc. One of the nicest looks (at least in my mind) is using the laser on anodized aluminum, the lettering comes out white. Anybody (trophy shops, etc.) with a laser engraver should be able to do this for you.
Do them yourself. You need a printer, an iron to hot transfert the ink on an alu plate and muriatic acid.
you can always make your own like KIRK! did... http://www.jalopyjournal.com/forum/showthread.php?t=540911&highlight=kirk+legion
Any marine/boat supply house has them done already,but this only helps if you live near water Anybody wonder what the keyboards look like in china?