Thanks for the links hareng....
Had alot of trouble finding one locally....ford dont stock them or cant get them anymore,
Its for a car we had in for mot,its a kit car based ona 1979 cortina m4,and the resovoir is leaking from where it seats against the cylinder,managed to source a seal kit but the plastic on the bottom of the res has distorted over time,so the new seal is no good either...