The guy who used to own ISR sold his biz an went to work as a tech at Rennick in Fullerton. His name is Ed Dowell and I think his wife Pam also works there, maybe as a service writer.
If Ed is still at Rennick, I recommend him.
If he's not, call Irvine Subie and see if Ryan Cavalier still works there and can recommend a good tech in their shop.
I used to race a subie, but have been out of their world for a couple of years.