I have polished ceramic coated TTI headers and I got them from Mancini. Don't know if they are cheaper or not.
What I did besides going with the entire TTI system was have my local exhaust expert to run the rest of the system after I bought the headers. It is much cheaper. Exhaust expert in my book is someone you know that can to a higher end job rather than just welding some pipe together. What I had done was 3" pipe coming out of the header collectors (about 9") reduced down into a 2.5 X-pipe (custom made) out to the mufflers and then turned down at the axle (I don't like exhaust tips because they will either turn color or rust). And need be (transmission) I can unbolt the system, drop it and move it out of the way and then reinstall with no problems. The work at the exhaust place was $250 but that includes a 2.5 X-Pipe.
Just making sure you know that it can be done a little cheaper than you might think.