The seals are available from Nelson Stokes at Camelford. Alternatively try Brakes International at Rochdale. There is however a problem with these cylinders. The bore of 15.9mm makes it hard to inspect the bore unless one has fingers like ET. What can happen with these cylinders is scoring at the inside end. The original seal can wear so that it fits the scoring but a new seal won't work. Unless the cylinder can be honed there is little chance of success. A useful test is to fit an air line to the slave cylinder bleed nipple (tape its threads with PTFE tape) If hydraulic fluid blows out of the reservoir when the pedal is down there is a problem. Good luck!Looking for a source of repair kits for clutch slave and master cylinders.
I have a Rover 825D, 1996, P reg.
Any help will be most appreciated.