It's a Yamaha OEM part, so any Yamaha dealer can get it. I feel like it's a big upgrade over the stock seat, it has firmer foam (stock seat too soft for me). Although some people might find it too firm.
I'm looking at picking up one of these seats also, however I have the New Rage Cycles Fender Eliminator installed on the stock seat. does anyone know if it might be compatible with the single seat (and loop) also?