I bought the woodcraft ones that were listed under s1000rr parts. When I recieved them they didn't fit. I contacted the dealer and they said I would need to buy washers for $2 each! I was pissed. They shouldn't list them as being for the s1000rr if they aren't going to give you all the necessary components.
I just went to the BMW dealer and bought OEM ones. Nice and sturdy and fit perfectly.