Mike might be able to answer that better than I, last I heard the only SoCal bases were the Customs guys flying out of NAS North Island and Border Patrol flying out of Browns Field just north of Otay Mesa border checkpoint (San Diego Co.) and Calexico. Since the merger I'm not sure.
I think there is also a CBP Air branch out of the AFB near Riverside??? I wouldn't wish South San Diego County on anybody
Mike help me out here??