where from mate?
You can get them from the TT shop...my missis bough mine for my birthday. At the time they were between £150 and £175 from what I can recall.They are worth the money. They fall to hand much easier than the stock buttons paddles.RR covers it all on the link Topher did.
Redrobin, Phil Mcavity and myself have these and jolly good they are too.