Brake Master Cylinder K1100RS needed

Bled brakes on my 1993 ( abs ) K1100RS and cleaned a shed load of brake fluid salt from around the master cylinder.
Bastid master cylinder has a slight leak, so will have to be replaced. I don't fancy using a repair kit as previous owner
(81 years young ) cannot remember if he ever fitted a repair kit or not !
So, anyone got one or a spare s/h jobbie? ( new one is £297 )
Bleeding the brakes from scratch will be a nightmare as calipers are slung underneath leading link forks with nipples at the bottom
S/S braided lines are fitted

Presumably it is a Magura which is the same as the R1100RS, try Beemer Boneyard in the states. I purchased a new one for my R1100RS from there. Or try Motorworks.

Good hunting

Thanks guys...just ordered the parts from Blighty, Motorworks

With splendid advice from Dr farkoff...have fitted the replacement repair part.
Bore was marked but used 1000 grit to remove ( think it was water damage )
to a nice fine feel. Time will tell when I next take her out.