A little bit more information, the following clutch levers are straight swaps onto the FZS600
FZS600 Fazer 98-01
FZS600 Fazer 02-03
FZS600 S Fazer SP 00-01
XJ600 S Diversion 91-03
XJ600 N Unfaired 95-03
TDM850 91-01
TDM900 02-03
TDM900 04-05
XJ900 S Diversion 95-03
Still trying to sort something out.
One way to get around is is buy a early R6 clutch bracket and swap it out for the FZS600, the clutch switch is a direct swap onto the R6 bracket too, tempting, but is it worth it?