If I want to use 283mm Sierra Cosworth 2WD brake discs on an MK4 with the original Escort RST S2 calipers, then I have to use front caliper mounting brackets, as shown here: http://www.rsrich.force9.co.uk/zetec-turbo/sale.htm

Unfortunately they do not answer to any questions, or orders.

Could anyone help me, and tell me the measuements of this bracket, so I can have it done by a local shop?