You're in Chatsworth, and you won't travel to Long Beach?
John at World of Strings is among the finest in LA. He truly is the guy to go to. I've seen more than a few basses set up by Lisa G, and she is scary good, but John is primo when it comes to getting the most out of your bass, especially for pizz work. Really a fine cat who knows his craft intimately, and I have first hand, multiple experiences with him. He's top class.
Try living in Oregon, where the best setup guy in the area is 6 hours away...Long Beach is an hour in light traffic. That is, fortunately, one of the ONLY things I miss about living in So Cal.