It is a little drive, but this guy on CL looks like he does good work. He's selling them built, but would probably go for modding yours.
I also have a buddy with shop in Rancho that does my SS welding. No brewing gear yet (waiting on ferrules), but he has the gear and experience. Send me PM if you want me to check it out with him. I need to get a hold of him anyway to get mine finished.