Are they the type found on the Evo 5-9? The ones with the 320mm front disc and 300mm rear I believe.
Same as I have ready to fit to my fiesta - the rears have no handbrake mech, so that's something to consider.
I'd have thought a mk1 focus RS disc would work on the front. The spacing on the mounting holes is different to the RS Brembo's, so don't try using brackets for those.