Call Audi and explain what one you want.
Part numbers for 2000 2.5TDI Quattro, but should be the same for yours.
8A0 501 387 D Eccentric bolt (Upper) or 8A0 501 387 C Eccentric bolt (Lower)
Get the eccentric washer too. 8A0 501 385 (upper) 8A0 501 385 A (lower)
The lower one through the hub is for camber, the one through the top control arm is for toe.
If you haven't changed/removed the ones through the top control arm, get them too and replace them. They will need to move for the four wheel alignment, and most likely will be seized. I had a ****** of a ob getting my rear control arms out due to the top bolt being seized solid.