It's as easy as ABC - Air Born Coatings.
The first company to ceramic coat headers was HPC - High performance coatings, JetHot, Air Born and everyone else followed. The guys that started Air Born are actually the chemists that worked for HPC, so they probably have the most extensive knowledge in the industry.
I figure the cost on the SS headers will be at least twice what the coated ones will cost. Part of that is the fab costs, the other is the SS cost. Generally SS headers run about $2000, these are for turbo drag cars and equal length doesn't matter, nor does tube size for some odd reason and they're normally not longtubes, more like shortys flipped. A set of fabbed equal length headers that aren't SS runs about $1000 uncoated. I takes about a day to do each side and a day to weld up and double check fit. There's a lot of bolting and unbolting that happens and they have to have the car/truck.
If you've got a buddy that will do SS headers for $800 or so, either you're robbing him blind or he's robbing the company he works for blind. Or it's extortion and you have photos of him in 'compromising' positions, LOL!!
If you just buy the bends and collectors to weld up a set of SS headers, you'll have over $700 in them.