I have finally got my rear brake caliper back in one piece, and will get the thing fitted tomorrow. I could not get anywhere with anyone to get hold some OE pistons, so I got a pair made from stainless steel. The originals are anodised aluminium, and score quite easy, these will probably out last the bike, and for 30 quid for the pair, they will do for me.
Yes, I know the caliper is still dirty but it is corroded in, and a hell of a lot better than it was believe me
Bugger it won't let me sort my spelling mistake out on the tittle.