I just Googled "Electronics Contract Manufacturers LA" and set the radius to 20 miles. 20 pages of results came up. None of them will work? And I'm giving you a bit of friendly shit because it shouldn't take very long to find a contract assembler. I tried searching for "Electronics Contract Assemblers" as well and got plenty of hits, some even specialize in small-batch projects and have experience with PCB, wave soldering, hand wiring, etc. And some even offer design services for layouts, aesthetics, circuits, etc.