I sent mine off to Calico Coatings located in Denver, NC and have referred others to them as well. I was extremely happy not only with the quality of the coating but also with the price. Plus at the time I sent them mine, they were able to get them turned around in less than a week. I went with the CoolBlack coating which is a perfect match with the black ceramic used on both Vance & Hines products along with CFR slip-ons (which is what I am running).
Below are links to to the company website along with a direct link to the CoolBlack coating description. If you do decide to give them a call, ask for Dave Adams and tell him that Lindsey from Iron Aces referred you...he'll take good care of you.
http://www.calicocoatings.com/
http://www.calicocoatings.com/coating-search/coating-detail.php?id=10