Unlike other systems, hueys aren't standard eeproms soldered to a pcb, so it's not a simple task to repurpose some common game into teh rarez. Even if you could easily swap the eeprom, you'd still have one hell of a time disassembling/reassembling the huey and replacing the label. It'd be easier to make all new hueys, but the investment costs would be in the tens of thousands.
As for 'players copies' that work but don't look original, they exist. Of recent times, there's chueys; back in the day, there were several different styles of professionally made boots.