Well, I found a welder out in City of Industry. Just did some searching around on the web for someone who does aluminum welding. If you really want I can dig up the guy's info.
All together, it was about $700 for the aluminum, and about $800 for the welding (took about 10 hours of labor), but that includes the powder coat. If I had been smarter, I would have talked to the welder first, as he could have gotten the materials for cheaper, or just used some of his own stock. Basically if you just find a fabricator you could prob do it for about a grand.
Overall I am very happy with the setup. Having no middle brace is really nice. Makes it easy to work "under the hood"