That Stug use to belong to 2nd Panzer "reenactors" in Illinois, it was sold to a group in California about 10 years ago, I think it is with an SS unit there now.
2nd Panzer: http://www.2ndpanzerdivision.com/ still have a Hetzer and repro 251's
12. SS: http://www.12hj.com/ with their Hetzer and repro 251's
Repro Pzkfw III out of Colorado: click on motor pool http://www.kampfgruppevonrybus.com/main/