I did my own timing belt service...so I am not affraid of work.

<ul><li><a href="http://www.audiworld.com/tech/eng69.shtml">Click</a></li></ul>

My car is getting all the timing belt maintance done right now. And mine was leaking so i replaced it as well.
I payed about 97 for the pump i believe. and you have to take the intake plenum off to swap it.
Its not that hard.