There can only be 3 scenarios here:
Its in an attic or collection, but youd think someone would go online and brag about it by now.....
Its at the bottom of the dump.
It never happened. <------Most likely scenario. Im sure they handed the winner $100 or something instead of spending hundreds or thousands to make a new game just for ONE kid.
Its like that He Man create your own figure contest back in the 80s....Whomever won got a figure made of their creation, well that never happened, all the kid got was a scholarship fund... its an interesting read:
http://www.he-man.org/resources/archive.php?id=942