Why not expand upon the golden putter with a 7-iron of the same quality and statistics? It would be an easy addition to make and could be rewarded to the second place country club (since it's largely a less important club than the putter).
Further, I would gladly take the prototype and play a full round with only that and a putter. I suggest making it an extra club, like a wedge, and using it regularly would mean using one of your five club slots for a second 7-iron.