Here's the info I got from the SRT-6.com site on SRT-6 production numbers.
As you can see from my signature, I have a 2006 SRT-6 Coupe. It was allocated to the US and assigned to a Chrysler
PR Exec for less than a year prior to being made available for private ownership. The unicorn part of the car is that it is painted in a color (Graphite Metallic) that was not available for model year 2006. It is one of two 2006 SRT-6's painted this color, and the only one that's LHD. The other Graphite Metallic 2006 SRT-6 (RHD) resides in Australia.