Having recently purchased my first Alfa, I did some research to find a mechanic in the area who specializes in Alfas. The only "official" source I came across was on the AROC-USA site:
Alfa Romeo Owners Club USA | Service Directory
Would be great to have a more complete list for unforseen probs when on the road or something closer to home. BTW - I took my Spider to Domenick's in White Plains for a look see when I first got it. Domenick's is the closest to me and was recommended by a friend. Owners Santo and Frank Spadaro were gentlemen and answered all of my newbie questions without flinching. Gave the car the once over and sent me on my way with a thumbs up and some suggestions for future maintenance - all routine stuff - at the end of the summer when driving season ends. I'll be going back this fall.