When I had my gen1 1000 I fitted an adjustable span clutch lever from a Kawasaki 900 ninja.
It was cheap to do and looked " factory", I am fairly sure a few other people had done it before me and I just copied them, you had to use the Kawasaki perch as well.
Remembered now it was the clutch lever from a Kawasaki ZX9 , C1 or C2 model.