A.S.
Go to martindale.com and do a search under "legal malpractice". You can also contact the State Bar (look at calbar.org under "Public Services") and see if they have any referrals.
It is very far from the truth that the state bar is the only entity that can sue this attorney, as one of the other responders stated. The state bar can disbar an attorney and prevent him or her from practicing, but that is different from suing. You can, and should, sue the attorney yourself. No one else is going to look after your interests as much as yourself.