i got these to fit my rocket but would you believe the mk2's are bigger than the mk1's and they don't fit
i have both o/s and n/s and will sell as a set or just one if you need.
there both from a 2006 car and are in good working order.
one had been painted blue (not well) so just cleaned them up and pained them black with heat proof paint. (before i realised they didn't fit)
make me an offer

Just to clarify the mk1 ran until 2004 and the facelifted version ran from 2001, these cars are sometimes called the mark 2 which can be confusing. All rear disc braked Foci 1998 to 2004 have the same caliper with, as you said, bigger calipers on the later cars.

Mark 1 calipers are likely to apreciate in price quite soon.....

Cheers

Chris