you wont get it as a seperate piece at the dealers AFAIK, you have to buy the entire pipe, i thought I needed one at one point but it was the fact the polo didnt have a servo the manifod was riveted shut meaning i had no braking assistance

most palces ive looked only do the vac pipe for it, not that valve, but i have the pipe c/w the valve in there.. its form a mk4 but its all the same jazz..