For the 2011 North American Handmade Bike Show Geek House Bikes out of Allston, MA made a custom polo bike. Below are some pics of the bike.
The Bike Snob had a good point about custom polo bikes.
"If bike polo had one thing going for it, it was that it was one of the last remaining bastions of cycledom in which people didn't use expensive equipment. However, with the advent of the polo showbike, it would seem that those days are officially over, and poloists have finally evolved into agoraphobic roadies."