Looking for a gate for one of our creatures. It's the gate with the switch for 'center shot', and it's completely missing from this game. I tried to look it up in the manual, but switch gates don't seem to be listed in the parts section. It might be that all three gates for this game are the same, but I can't even find a part number for one of them. Would like to buy one, or at least get the part number for it. Thanks!