I have a Triumph high sissy bar (yes, I said sissy bar!) and I am very impressed with it. High quality, good looking peice of gear, my wife is much more comfy on rides. Kinda spendy though.
I got mine from Hermys, it was far and away the cheapest place I could find. The prices are in US dollars, so hopefully you can do the math! Heres a link:
Hermys sissy bar page