I sat in the Superformance GT40 this past summer @ Mid-Ohio. Whitey's Auto Mall
http://www.whiteysautomall.com/ had one on display along with a Cobra and Noble.
I am not sure if Whitey's is a direct dealer or a sub-dealer for Dynamic. Either way the GT40 was awesome with the typical fit and finish one would expect from Superformance.
I think they still have it in stock according to their website.