I don't know of anyone directly in the Orange County area. However, Dr. David Schechter is located in Beverly Hills. He is a TMS doctor who studied under John Sarno. He himself had TMS and was treated by Dr. Sarno for (I believe) a knee problem if my memory serves me correctly. I have seen him twice and I really liked him. His phone number is (310) 838-2225. Good luck!
Oops! I read your post so fast I didn't see where you said therapist or psychotherapist. Sorry! I saw Don Dubin too, also recommended by Dr. Schecter. Dr. Schecter had a whole list of other therapists and he may have some in Orange County. Perhaps you should see him at least once to get the referral.