I have had some squeaking/groaning noises from this area of the car (for several years in fact!!) and after a bit of research and speaking to the local dealership I ordered the complete set, including Tierods from these chaps in Germany. The parts come with a 3 year warranty.

If you want them shipped to the USA you had better email them first as ebay will not accept the order due to the 'strange' shipping destination, but ATP will accept direct via paypal.

Cheers
Grape
(no I do not work for them, just impressed with their gear)

http://cgi.ebay.co.uk/WISHBONE-ARMS-...3A1%7C294%3A50

 

Update: The car was in an Audi dealership yesterday with the instructions to change only what are already worn or is wise to change. They changed all apart from one side upper arms, and one tie rod. They charged 3 hours labour. I then had the tracking (wheel alignment) reset which was another hours charge (at a tyre dealers).

I am pleased I brought the whole set as the initial advice was only to change the lower rear arms, but after getting under the car they did far far more.