I'm more in contact with the MG side of LBC's but most shops that deal with British cars and racing could probably help you. I don't know of a shop in the California area to recommend, but shops like Acme Speed Shop (Hap Waldrop)
http://www.acmespeedshop.com/, Prather Racing (Kent Prather)
http://www.pratherracing.com/, or Motorway Limited, (Bill)
http://www.motorwayltd.com/homepg.htm should be able to get you going in the right direction. All of these people have good business reputations and were recommended on various bulletin boards.
'73 Midget (V6)
'59 MGA (I6) under construction
'73 Lotus Europa
'52 MG TD kit car body project.
'98 Jag XK8
"There is a fine line between a hobby and mental illness"