Andy I bought one of these to make a set up.
Are you planning on painting them as the same carrier is used on all sorts of A4's,VRS, TT, Passat, Seat Saloons, I shopped around and got the cheapest one which I think was from a TT - unpainted. Ive still got the box at home, I'll get you a part number.....
I was after those calipers myself on ebay simply to have the bracketry off them to speed up refurb turnaround as I have that stuff plated.
Didn't even notice what they went for last time I looked they were at 60 odd quid you can buy new ones for about 45 each from Brakes international, I was planning on bidding about 30 quid just for spares really.
Expect to pay about 80 quid per corner for the rear carriers - hope it doesnt prove to expensive for you all told
