Small leak from plastic part on side of engine

Hi, I have a 1.8 carb 92 golf clipper convertable. There is a small water leak from a black tube/mounting (which is bolted on to side of engine) that has a water pipe clamped on to it. It seems to have a slight crack in it. Does anyone know what the plastic part is called and where I can get a replacement from?

Cheers

hi miclj

had similar problem part no is 026121144E
if you look at this site you can find all parts
http://www.vagcat.com/epc/cat/vw/GOC/1990/44/49/491139/
 check out your local vw garage for part
haydn

Is it on the right hand side as you look at the engine? If so, you should be able to pick one up from any factors. I got one at the start summer. There easy to fit. Make sure you drain your water and re-fill correctly after fitting. Open the heater matrix and remove all air etc.