does anyone know where i can find the stock blowoff valve in my 1.8t i been looking for it but i cant find it

its a 1999 a4 1.8t

<center><img src="http://pictureposter.audiworld.com/39415/1.8t_engine_with_descriptions1.jpg"></center><p>it's at the left hand end of the radiator about a foot from the top. removing the intake tube that leads to the air box will help you see it. in this pic it's called a bypass valve