You might want to contact the adoption agency and request "non-identifying information" about the adopting family and also request a "Waiver for Consent to Contact Form".
County of Los Angeles
Dept of Children and Family Services
695 S. Vermont Avenue
Los Angeles, CA 90005
Phone: 213-739-6251
California Search Website:
Other great websites to check out:
http://www.adoptionchat.com
http://www.adoption.com
http://www.adopting.org
http://registry.adoption.com/