Here is a list of referrals in the state of Californiahttp://www.nccn.net/~wwithin/STEVELIST.htm#California
It lists several classical homeopaths in the Bay area, (SF, East Bay and Palo Alto).
You might try contacting any of the below places to ask for referrals as well if any of the above don't work out, though it looks as though there is a varied choice. Sorry I don't know of anyone personally.
Good luck to your friend though.
Institute of Classical Homoeopathy-San Francisco
1336 D Oak Avenue
Saint Helena, CA 94574
(415)248-1632 voice mail
Classical Hahnemannian training offered in seminars and four-year program.*
Pacific Academy of Homeopathy
1199 Sanchez St
San Francisco, CA 94114
Professional training over three years for students of all backgrounds.*