Some considerations for finding partners:
The Outdoors Club has 5,000 members in SoCal, with about 20-30 capable of this trip. membership is free, and you could post the trip, and might attract some folks:
www.outdoorsclub.orgClimber.org is another internet site, that tends to attract more serious mountaineers, especially in California. You can post your trip their, also free.
www.climber.orgThe Peak Climbing Section of the Loma Prieta Chapter of the Sierra Club is always looking to list mountaineering trips, even by non-members.
Bob Bynum, the editor, might be a contact for that:
pcs-editor@climber.org <pcs-editor@climber.org>
And their site is:
http://lomaprieta.sierraclub.org/pcs/