Bought 2 sets of these suckers for my NSR's and they bolted on no problem. Really nice levers. They're in the U.S and they're Guaranteed for life. Otherwise, anything CBR600/F2F3F4F4i (1987-2006) fits the nsr. May want to go with the shorty's because the clutch lever just touches the tachometer full right turn.
http://asvinventions.com/Sport-Bike-Brake-BRC520.html