Looking for a trim piece for my 99 avant and I can't really find anything anywhere. It's cracked off on one side so I think my only option is replacing the entire piece.

 

1-800-all-audi
shokan auto parts

 

www.car-part.com -> search by image -> click on the parts you want.

 

If you search for it based on its part number and you can't find it, then probably you need to call the dealer and get the new number. There's a high likelihood that the "old" number is obsolete.
Since it is a piece of trim, you may want to insert the "GRU" ending in your search, as it means it only comes primed, and actually not painted in a certain color as the OE part number - I just learned that.