Hi guys so trying to find the info I'm looking for I'm going in circles . One search brought me to an Audi forum not sure what one and the guy successfully found a set or rear mudguards for his face-lift S-line avant but the ebay link is non existent now. Any current eBay ads says they don't fit the s-line and I don't want to fork out dealer prices for some bits off plastic. My car has mudguards fitted all round but I've seemed to have lost a rear one. My suspicion is the wife has reversed over a kerb and lost it and never noticed it. So any help much appreciated guys.

Hello Dave,

I guess you are talking mud flaps. 
Have you tried Ali Express ( China). I bought a set from them for a non Audi a couple of years ago, and if I hadn’t seen the packaging before they were fitted, I would not be able to see any difference between the ones I would have bought from a main dealer. 
You could also register your ‘want’ on one of the on-line car breaker link sites such as Partsfinder - there are more. 
It would be great if you could share any success with other members.

Kind regards,

Gareth. 

Have you looked at USD items only on eBay or considered international sellers on there?