Hello Arron,
If you want genuine parts at discount then I would be following my advice and start searching EBay for Audi dealers who are selling there with a discount. As I say, Aberdeen Audi (ask for Malcolm) were one who were offering discounted prices - and will mail order.
You will have to go on EBay to look for Brembo discs anyway - so one stop search.
‘.....speak to some local dealers ....’ . You might stand as much chance of getting a discount as I have of getting my hair back! I really wouldn’t waste their time and yours.
Kind regards,
Gareth.