Southern California is kinda of a big place, any chance you can widdle it down to a more localized area?
http://www.ochealthinfo.com/medical/ems/licensing/training.htm
Listing of training centers in Orange County.
http://dhs.lacounty.gov/wps/PA_1_QDN2DSD3005DD02DJ6VQC830E7/EMS/pdf/ApprovedEMTPrograms.pdf
PDF file.
Los Angeles County EMT-I (1) [aka EMT-B] approved training programs.