So. Cal is a huge area...
But a machine shop near you should have the capabilities... Check your yellow pages and ask questions.
Off the subject, but on the same subject, my work needed to find a metallurgist... someone to check Rockwell ratings, and stress points. I knew of one machine shop in our area, but they moved away. This left me going through the business pages fairly blind. But I'm fairly capable of talking the talk, so I started by calling the closest machine shop first. I couldn't believe how nice and extremely helpful this guy on the other end of the line was... He wasn't able to do the work we needed done but he took 15-20 minutes to direct me to people who do. He gave me names and telephone numbers. This guy was soo cool that he staked his reputation on these referrals... He told me that alot of the machine shops in the area use these guys...
So we chose one of the companies that we were referred to and not only did they test what we needed testing, they did it on the spot (meaning, we didn't have to drop it off and come back in a few days), and they found out what was wrong with the product and didn't charge us a thing.
There is no question that we will use this company again, and refer anyone looking for the same services to them.
So now, are you ready for this???
What's the best suspension lift? What's the best locker?? What's the best tire??
It's all relative... What's the best for me isn't the best for you. The best machine shop could be complete A-holes if you catch them at a bad time.
I read somewhere, and I'm tempted to change my signature to state:
"Asking me what the best is for your rig, it like asking me to tell you YOUR favorite flavor ice cream"
I hope this helps.