I've not called all of them, but I have called a few. I actually went to Star Power and they had Heresy IV's, but nothing else from the line. There are just a couple actual HiFi stores in DFW that have demo rooms. From what I found none had the speakers mentioned.
I believe in DFW there are like 25 or so that are Heritage dealers. Many are Best Buy Magnolias. At one point Klipsch was advertising come here the Cornwall's at one of the Star Powers but I couldn't make the demo unfortunately.
I will probably dedicate a good part of tomorrow to calling, but most of the leads I got on the Klipsch site were not promising which is why I threw this out to the community here.