Ah guys, the spacers you are looking for are 12mm flat washers. sheees. Measure the bolt.
The fact that these are floaters makes the install pretty simlpe as you can pull the caliper more off center as needed as long as the bridge of the caliper clears both sides of the rotor.
When you get your washers take a mic with you to the hardware store and measure them. This way you'll get ones that are the same thickness. (or you can get ground shims from me in various sizes) This will help keep the caliper square to the rotor.
I can also supply you a thin .090" wheel spacer that will cure your problem to the spokes easily.
The piston in the Focus part may be a bit larger, no notes here at home, so the pedal travel will be slightly more if that's the case. But it should firm up down a bit deeper if it's bled properly.