Andy - I have extra PE from the Voyager and Eduard sets for the Tamiya kit and wanted to also build a Dragon kit side by side for comparision and PE part swapping.
the cyberhobby kit 6510 is one of the weird White Box offerings from DML: a Pz.Kpfw.III Ausf.J Command Tank and Borgward IV Ausf. B (remote control engineer vehicle (e.g. explosive layer) and control device to the kit.) I got it for in a massive SB sale 3 years ago, was down to about 20$ (goes for 60+ usually). I actually blame my massive life-long-to-build Dragon stash mountain on Sprue Brother's sales....
I also have the CH Orange Box Flammpanzer III (kit 9113) if Dupes has too many builds to do (which is an oxymoron, man is a build machine!).