I ended buying up buying a new pump as the used one I got was fucked too.
Its not genuine but a good re-cast from the original manufacturer.
It came from Motomobil and fits and works fine. No problems with the timing belt.
With the strong Pound vs. Euro you might get a cheap replacement buying in Germany although the pump was sold by a distributor from UK.


http://www.motomobil.com/wasserpumpe...0243200-1.html