Search Google for: City [put in yours] psychotherapy sliding-fee

Or, here's some professional referral lines:

National Association of Social Workers (NASW)
Counseling and Psychotherapy Referral Service (213) 852-4769

Southern California Psychiatric Society
(Have referrals for Psychiatrists who take Medi-Cal) (310) 815-3650

Or check your own phone book and call local people and ask for what you need.