Covert Chrysler in Austin has a mechanic who's certified on both the Crossfire and the Viper. (Went through the whole training course - they also have the whole set of special (Mercedes, mostly) Crossfire tools.)

I've had them do some work on my first SRT-6, but the wait times for their shop, especially for Crossfire/Viper, are quite long (often a couple of weeks...)

Granted, most Chrysler/Dodge dealers aren't really very capable of working on our cars, but some are. FWIW, MB of Austin refuses to do any work at all on a Crossfire - they literally won't touch one - go figure...