Hi,
What is the cheapest way of getting these pieces of plastic? My 2001 FL 2.8QS had one when I bought which recently vanished

So I need two. Is the cheapest option actually going to Audi and getting them straight from there? Some cheeky monkey is selling them for £104 each on ebay!!! for a piece of plastic! Why on earth are they so much more than the PF ones? The only difference I can tell is there is a slightly different shape and a hole in the middle yet PF ones are about £20 on ebay.
Thanks