where to get exhaust manifolds ceramic coated

GTGrinly, thanks for the recommendation but I'm not doing ceramic coatings at the present time. (I fired my high temp supplier last September for a variety of very good reasons I won't elaborate on here and have been trying to find a suitable replacement ever since. So far, none have blown my skirt up.)

High temp ceramic is the only way to go on exhaust. Regular powder coating won't cut it.
when you find one that does blow your skirt up, don't forget some pictures please.....