Metal water pipe?

Hi there I have an 87 1.6 carb cabriolet, the metal water pop has a crack in it so I have puttied it up for now but need to replace it, any1 know the part number or where to get one lol? Thank for any help

Euro car parts or gsf used to sell then so might be worth a phone call as its not listed on there website. I brought one but it was a couple of years ago.

Yea I've looked on gsf and ecp and saw they haven't got it listed, neither has vw heritage! Quite annoying having to keep topping my water up every day or so lol so looking to buy one this week, well as soon as I can find one haha!

Vw heritage only seem to list the metal pipe without the expansion tank, top fill radiator and that's out of stock for 3 weeks.
there is one listed here on ebay
http://www.ebay.co.uk/itm/VW-GOLF-MK1-AND-GTI-METAL-WATER-PIPE-COOLING-PIPE-C178-/220891641055?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item336e2af4df
not sure if its for your car, have a look at what's there and see if the outlets are the same.