I am told there are 2006 SRT-6 cars. Not that any of them ever had 2005 VIN's, but that they were made and could have been numbered as '05's, but were not.
Having said that, my dealer says the ports have run out of 2006 SRT cars. They may still be on dealer's lots but none are left on Chrysler Corp. holding lots. It is also safe to say there will not be any Crossfires badged as 2007 models. Chrysler is still dangling the possibility of a 2008 Crossfire, but even the dealer says that is...remote at best.