Welcome Sondra,
You are asking for very localised information whereas the members who have 40s on this forum are spread throughout various continents and I am not aware of any of them being particularly close to the Bay Area.
However I think you have several options:
1 Ask your question on i8mud.com forum (40 series) as that is an American based forum whereas this one is UK based.
2 Contact Spectre Offroad, based in LA, who, as a major 40 series parts supplier, may well know of suitable mechanics or workshops in the Bay Area.
3 Try contacting the local Land Cruiser club and request help -California clubs appear to be affiliated to the Toyota Land Cruiser Association - might be worth starting with them.
Hope that this helps you find a suitable person to fix your FJ40.
Regards,
Rodger