I have took a chance on a kit for a MOD Land Rover which appears to be the same cylinder. On arrival it also came with even more parts including a pair of roll pins to attach the plastic brake fluid container. Like you we used to carry all sorts of spare parts that would not be available quickly in Europe. Even now I carry a new spare clutch cylinder in the car at all times. But after all the years and miles the car is still on the original brake light switch. But we still carry a spare.
For anyone looking like me the seal kit the part number is SP7698 and listed for MOD LAND ROVER.
Thanks again Luddite
