Well, I've never bought one and I have no idea how they fit. Friar had one made for his bike but I don't know if he ever used it.
here's what I have seen for sale:
http://tsukayu.com/UShapeBar.html

http://www.jpcycles.com/product/840-379?...CFZRr7AodMhAAIg


SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq NEW: 19 Goldwing Tour DCT