See my
CRG Lever Mod Thread - you can use the same trick utilizing the Kawi clutch perch and then buy the Carbon levers for the Kawi application. Total outlay ~ $100. ($50 perch & $50 levers)
There is nothing interchangable with the Triumph clutch lever itself, although the brake is pretty std. & readily available Kawasaki/Suzuki fare (Nissin)