LONG BEACH, Calif. -- The reclusive indie rock entrepreneur known as Long Gone John is rummaging around his backyard warehouse, searching cardboard boxes on wood shelves that reach to the ceiling. Every box is filled with CDs or seven-inch singles, most of them by punk and retro-rock bands with names you've never heard of: Savage Pencil, Loafin Hyenas, Crowbar Salvation. He stops searching when he comes across a 45 by a band called Servotron. "See this?" he asks, proudly handing over a copy. "I had this pressed on special silver vinyl. It's really expensive. I lost a lot of money...