Thanks for the Part number, I will follow it up.
The unit for sale in ECP, is similar to the one VW are offering (Part Number 537 633 019B).....the problem with that unit, which I attempted to fit was that the mounting bolts on the flange of my unit are mounted in the 2 O'Clock / 8 O'Clock and on the Current VW / ECP unit they are mounted in the 9 O'Clock / 3 O'Clock position............resulting in the unit being mounted at an angle and the resevoir leaking.....Frustration.