Kawasaki OEM slave cylinder fully working removed yesterday to fit an Oberon for my weak hand.I was using Dot 5 so am including a new unopened bottle or you can flush through and use Dot 4.
I would advise to use a new spacer.
Included free of charge is a new Hel clutch line,I couldn't get it to line up on the Oberon so kept the braided line already fitted, its me or the line at fault hence free.
I bought new tank rubbers just in case, the originals here are OK just put on some rubber grease [I washed them as you can see].

Price is 75 plus postage or collect from Oxford or 40 mile radius ride out for free (but not central London I dont ride there].
This is best suited to someone with mechanical ability.