Rattler - the shop I gotthe bike from replaced them ( begrudgingly ) under their warranty, I just put a bit extra to the cost to get these. I think they retai l@ £176 - Nelly could tell you for definite.
Guido - it's an ST4S, not an SS. An easy mistake to make as I missed out the pipe & slippers in the photo!
Rob, the reason I don't use the brakes is due to my sedate riding style....:P