Only place I found is hot shot performance coatings in Davie.
I've ordered new long tubes and am considering having this done myself.
The benefits of ceramic coating are really just reduced engine bay temperatures, which would result in slightly better intake air temps (the cold air kit dam is already protecting from ambient engine temps).
The cons are:
1) Cost.
2) The heat is going somewhere, which means rather than radiating out from your headers, it's simply traveling down to your uncoated exhaust sections and increasing the average temps there. If you don't have proper heat shielding elsewhere it can be an issue and also increases the heat disparity between the exhaust and adjacent parts.
I once had a custom exhaust installed on a Toyota Tundra. Later in the week, I hauled a trailer with a Ford Fairlane on it about 300 miles. On the trip, I heard what I thought was a loud pop, but it didn't seem like anything was wrong when I stopped for fuel. (that's how good the brakes are on the Tundra btw). Later, I realized that the idiot installer had placed the exhaust bend too close to the brake lines, so with the truck loaded/squatted, and under hard duty (like hauling up and down hills with 4 tons in haul) the exhaust melted a section of the brakeline assembly and thank goodness the yota has two different lines/cylinders (one for the front and one for the back).
My point is, Ford tested our cars with no ceramic wrap. They heat shielded the areas they noticed got heat soaked or thought it needed it. If you ceramic coat and you send MORE heat through the exhaust, it's going to raise the temps and might expose a proximity-heat concern that wasn't there before (during testing with non coated headers). The chances are slim, but it could melt or give problems to some other component with the higher heat. God knows the undercarriage of our car is busy busy and crowded.
Like my story above, when exhaust is either too hot or too close, stuff melts/fails and hopefully it doesn't kill anyone in the process. I completely screamed at the exhaust installer because they should know better. He adjusted my exhaust bends over the axle (for free obviously) and apologized profusely.