I have not eliminated this option. I work in a very deliberate order. 1) Exhaust Alfa dealers list, near then far. 2) Exhaust recommended independents, near then far. 3) Exhaust wild card options (such as going to a Ferrari dealer).My local Ferrari dealer's bill rate isn't really any higher than Toyota or Mercedes. Even if it was $25 an hour more and it's a 6 hour job; that $150 is worth extra care and expertise IMO.
I would not discount going to another exotic mainline dealer to do the work if you know they are good. I would also insist that they order the parts so they are warrantied under their parts and labor agreements. If something breaks and they did not sell you that part, they'll tell you pound sand.
One thing is true: None of them are good at answering their phones, and voice mails get returned, but often the next business day!