leak from pipe

[barkster1971]

Hi, on my 1984 D24T engine, there is the metal pipe that runs along the inlet manifold that joins a rubber hose that's between the pipes to and from the heater matrix. It then goes round the back of the head. I need a new rubbe r hose. Any part numbers for it?
NOT the heater pipes!
https://imgur.com/a/Br76Niv