Alternator rebuilds in SF Bay Area?

[MWood24020@aol.com]

I believe one of the diode plates in my Z06's alternator fried this  
weekend...only getting about 13.4 volts at freeway speed with no accessories on 
 
(usually 14.6) and it drops to 13.1 as soon as I turn on the climate  
control...then 12.9 is I hit the brakes or use a turn signal.
 
Does anyone know of any shops locally that rebuild alternators? It looks  
like the new ones are not too user friendly, so I think I need a professional  
shop. I'd rather do business with someone local who uses high quality  
replacement parts than just buy one from an unknown source.
 
Thanks
Mike Wood