I've got a set of B7 A4 calipers and carriers that you could buy from me. You would have to get S4 carriers, rotors, and pads, or you could run the stock B7 A4 320x30mm rotors and pads. If you get this setup from ECS Tuning, you get cross-drilled, slotted, or stock rotors and the S4 carriers, for what amounts to about 240 quid if I have my currency conversion right. I'll sell you my caliper setup for 200 plus shipping, and after you get the ECS kit, all you'd need is B7 A4 front pads to have a complete setup. I just did this to my A4 with a set of S4 calipers and carriers, stock rotors, and Carbotech Bobcat pads. They don't seem to dust very bad at all, and the difference in stopping power is hugely noticeable. You would have to run 17"s at the minimum though, as my 17" BBS RCs have just a few millimeters clearance between the wheel weights and the calipers. Very nice setup though, and it fills the wheels up nicely.