For those living in Los Angeles area, here is a list of shops that work on 1st gen GTs/Spurs. All of these shops let you bring your own parts.

Empire Motorsports - Glendale - Labor $165/hour - Seem nice on phone
Bruno's Auto Service - Santa Monica - Labor $160/hour - Cash only unless you let them supply the parts - Straight shooter
A Certified Autowork INC - Glendale - Labor $160/hour
Zape Motors - Monrovia - Labor $200/hour - Top notch service, can do anything, doesn't miss anything you say, sends vids, sends part #s if you want, etc
Euro Auto Service (AKA Bentley Ferrari Porsche) - Los Angeles Verdugo Road - Labor $190/hour - Tons of newer Rolls Royces and Bentleys littering the property every time I go, fast, responsive
Otto's European Coach Werks - Santa Monica - Labor $220/hour
Euro Star Auto Group - Formerly Euro Pros - San Gabriel - Labor $125/hour at old euro pros location

In addition there is this place which does not allow bringing your own parts:
KS Complete Auto INC - Glendale - Labor $200/hour - Polite and responsive

There are about a dozen more that I didn't include because they are rude, screamed at me when I asked for hourly rate, or charge $300-$500/hour

 

Very helpful for the LA group!

Any suggestions for San Diego area?

 

Never checked San Diego area unfortunately. Too far for me.

 

Any of the shops knowledgeable about the GTC tops and repairs?

 

Never asked. Quick phone call should do it.