ISO family members for my BF born 2/16/82

Hello, I'm helping my boyfriend try to locate any biological family members. He believes he was born in San Luis Obispo. The adoption agency was Children's Home Society of California in Santa Barbara. We know his birthmom was 17, and birthdad was 20. She is 1/2 Mexican and 1/2 German. The dad is white. His adoptive parent's named him Ryan Anding. The agency nick named him "Jay J". We don't have anything else to go on. Thank you!