Thanks Gareth,
Yes, my Audi is a Year 2000 model and Audi have told me that they don't make these parts anymore and they have nothing in stock either. I come across people advertising the part on websites, but once I put in an order they come back saying that they don't actually have the part. I keep trying - I have actually just put in another order in the last 20'. I will see how it goes, but if it doesn't work out, I will try Partfinders (also recommended by the extremely helpful spare parts gentleman at Audi Finchley Road, London this morning).
Car is as good as new with about 29,000 miles on the clock, so want to get some more years out of it!
Thanks again
George