My AMR list
Santa Clarita: 460.550 (100.0)
Antelope Valley: 461.5125 (192.8)
South Bay: 45.88 (146.2)
San Gabriel: 47.46 (100.0)
San Fernando Valley: 46.00 (107.2)
Irwindale: 47.62 (127.3)
Orange County: 47.66 (77.0)
LA: 46.04 (123.0)
Try those and let us know what you hear. The AMR units for that area are numbered 83xx for BLS units, and 82xx for ALS units. San Fernando Valley are 63xx for BLS, 62xx for ALS. Santa Clarita and AV are 93xx for BLS, and 92xx for ALS.