Axle in vehicle or removed? Try San Diego Gear and Axle in El Cajon. If not look up RWK Haus Supply. He is in Yorba Linda but does great work at a fantastic price.
Ryan Brown geared my 30/8.25. Not sure if he still lurks here or not. Did a great job.
Pro Gear in San Diego did a good job with my 60.
'The Differential and Axle Shop' is in Escondido, but I have no experience personally. I've heard good things though.