Performance Coatings http://www.performancecoatings.com/index2.html. They will ceramic coat inside and out and powder coat other pices as well. Reasonable, several good color options for exhaust, easy to talk to and decent turn around.
Performance Coatings will send you samples of their work so you can see the colors firsthand. They will send all or just the colors you are interested in. I can vouch for the quality and service; they coated my Rinehart TDs, rocker boxes and covers, air cleaner cover and cow bell.
Pro Kote Indy does alot of ceramic coating for V&H. I had them the a bunch of powder coating for me a couple of years ago, price and quality were both excellent. They also fully prep all the parts the finish.
My only first hand experience is with HPC (High Performance Coatings). They did my Road Rage in black. Has held up well. Price was a little less than Jet Hot and turn around was 1 week, exactly what they said it would be.