The bar itself is under the car, but the links are right about center of the wheel and is right there when you take the wheel off. Bushings are possible like the upper part of the upper arm if you think the noise is coming from up real high. I always thought the joint at the pinch bolt failed first though, before those bushings even came close. This: http://www.ecstuning.com/Audi-B5_A4-..._Arm/ES257326/
is the only possibility for what you want, this one isnt really clear though... The others are either for your lower control arms, or your rear control arms it looks like. I would take the wheel off and poke around before you order anything though... Then that lower upper rear front curved stuff will make more sense to you at least..