The Boca/Cupra/FR is fitted with two part 288mm brakes which are the same as the 312mm brakes, so all you need are the carriers and the discs to upgrade to 312mm spec.
you are joking, ive been trawling the net for carriers and calipers.
Ive got 312mm discs already.
Wheres the best place to source the caliper carriers then? cant imagine them being to dear to buy brand new?