You've got a couple different routes for getting carbon fiber.. you can get actual carbon fiber parts, but those are expensive and kind of unnessacary.. I know several members here have some, and they do look mighty nice.
A cheaper alternative is to buy carbon fiber vinyl(essentially super powerful sticker) and remove those parts and cover them in carbon fiber.
Here are some websites to get carbon fiber vinyl;
- (I have carbon fiber vinyl from there and it's cheap and hard to work with but it gets the job done, the adhesive isn't very strong either)
- (TXJ has some of this carbon fiber vinyl on his WJ, and it is really nice, I've bought the sample and it is defiantly very nice quality and uses 3M adhesive, it holds good to weather effects, etc.)
Best of luck! Keep us updated on your progress, and choices!