I have contacted them, they can supply the rubber bushes for the link arms, and I'm waiting to know if they will supply the cylinder seals.
This morning I started to strip a spare one, just to see how it goes, getting the two end caps off is a real pain, as it is really hard not to damage the griping pattern on them, either in the vice or with stillsons
Then I managed to get the core plug out to expose the shaft, I tried a half hearted tap with the punch to test for any movement, but not a bit of it, I could try harder, but the original link said that it had to be 'pressed' out, that's probably beyond me, as I don't have a press......another trip to machinemart I expect !
Jules