The dimensions of the mountings on the MK2 knuckle are virtually the same as the Focus ST170 (3mm difference axially made up by spaces when doing the 300mm conversion). This link has dimensions of brackets for a ST170 to FRS conversion.

http://www.focusowners.com/forum/viewtopic.php?t=21828

But demonstrates its not quite as simple as it might seem as there are clearance problems between the disc and lower ball joint.

IIRC, Zoo Motorsport did conversion brackets for Escorts. The bolt centres are the same (but 10mm) & axial difference is even greater, but they should be able to make adjustments to their design.

Martin