every mk3 mondeo has the same brakes front and rear other than the estate which has different rear calipers due ot the suspension design

what you want to do is bolt on a set of focus st stoppers, they are bigger and there will be more scope for improvements once you get the calieprs

the will also fit under a set of 17's

or if you have £2500 odd to spare you can call martin and get one of his 362mm 6 pot ap kits and wheels