I've been looking all over Cape Cod and South MA and haven't found a single tuner shop. I think that you might have to look into the bigger cites such as Providence, Newport, Boston. Worse comes to worst, I would look for a bunch of ricers parked and hangin out and see where they go to get hooked up. They might give you a little bit of crap and joke around for having the Bimmer but we all have the same common passion when it comes down to it. I'm sure they will hook you up. Other than that, I'm in the same boat as you are. Let me know if you find somewhere.
PS: If you race one of them...beat their ass!
"accelerate till you see GOD>>>>>then brake"
<img src='http://img145.echo.cx/img145/8840/mack21876zl.jpg' border='0' alt='user posted image' />