California In-Home Support Services
http://www.cdss.ca.gov/In-Home-Supportive-Services

Care.com is a for-profit site advertising caregiving service
http://www.care.com

Private Caregivers in Santa Clara County
http://santaclara.networkofcare.org/veterans/services/subcategory.aspx?tax=PH-3300

Independent Living Centers - many locations maintain a list of caregivers.  Contact your local office to see if they do.  
http://www.ilru.org/projects/cil-net/cil-center-and-association-directory-results/CA

Easy Does It Emergency Services provides assistance to individuals with disabilities and seniors living independently in the City of Berkeley. Should a disabled person or senior experience an unforeseen crisis or a temporary lapse in attendant care, that person can call Easy Does It for assistance.
http://www.easydoesitservices.org/