rear brake upgrade advice

[dummi]

i'm wanting to do a rear brake upgrade the fronts are good beefy porsche 6 pots 350mm discs but rear are still stock 1 pot with 255 x 10 mm discs. cos we have the hand brake integrated into the calliper there are only two solutions adapting the current 1 pot for bigger diameter discs or having the 4 pots with seperate handbrake caliper, the latter being £2500 ish is more than i want to spend on this car at the moment so i'm just thinking an adapter for bigger discs will do fine

i note ecs have been doing one for sometime for the s4 which has 255 x 22 mm discs , but none for the a6, i really want to know what my options are, /ubbthreads/images/graemlins/noidea.gif