I'm very happy with the custom numberplate graphics I got for my 2013 300RR from HBD Graphics out of Florida. They do the graphics for the American Beta team and were very easy to deal with over the phone to build me a custom set. Sending proofs at no extra charge meant I could be sure of the final design. Other companies charge for that critical step.
I know some have used PG for their graphics, and they turned out very nice too. Couple of options to consider lest all the Beta's out there look the same, heaven forbid.