I've had luck with MS Publisher, and even WordArt, on the expanding font thing for the "Centurion," and I re-created the Ironman logo pretty quickly (about an hour) using Publisher.

I kind of agree with other posters; get it blasted, then painted or coated in colors you like, and put your Centurion name and model on in a way it suits you. The Centurion decals are very, very busy, and if you try to replicate them, you'll spend a lot of time doing so, and a lot of time placing them back on the bike.