How about a complete TRX850 rear-end conversion? Better (rebuildable) shock with preload, compression & rebound, swingarm looks much nicer, superior rear brake as good as FZS1000 & fazer wheel is identical to TRX rear so a straight fit. I have a swingarm out in the shed, could measure dimensions if it appeals to anyone?
Early Fazer1000 shock is 305mm long....wonder if it could be made to fit as plenty of owners are selling them as they are converting to R6 shocks.
Also I think the newest R6 shocks are 300mm....another option?
Both also rebuildable too, which would be a bonus over the standard 600 unit