OK - I finally got a chance to talk to my neigbor about this yesterday. He says he can do them in raw steel for $150, and he can get them powdercoated for $175. When I made mine, I just primered it with Rustoleum primer (pretty heavy coat), and then satin or flat black Rustoleum, and it looks fine too. Haven't had any issues with it flaking or coming off.
He said the biggest thing is that he needs to do them in batches of at least 5 or 10 at a time, because a lot of it is just set-up time on the machines.Also, he's going to do this in his spare time, so don't expect it to be like some retail store and it ships the next day.
If anyone wants to start a list, PM me here, or shoot me an e-mail. Once I have commitments from at least 5 people, I guess we can go from there or something.
Have a good one.