Was skimming around on Ebay today and found this. http://cgi.ebay.com/Q-berts-Qubes-Colecovision-Game-RARE-qbert-q-bert-cube_W0QQitemZ370226997204QQcmdZViewItemQQptZVideo_Games_Games?hash=item56333fa7d4
I'm not entirely sure if it's worth the price or not.
Scratch that...it's a Colecovision version.