They should fit. Not guaranteeing but the Jaguar has 12.5" rotors and two piston calipers, bore size might just be perfect. And the Jaguar came with 245/40/18s for tires, I'd go down to a 235/40/18 to keep the Speedo the same and your profile the same.
if they are meant for a 400hp V8 Jag then I bet they are good enough for a Focus. Try them out. Oh and they were an $800 option to upgrade from the stock 17" wheels.
2012 Oxford White Focus Hatchback
Dyno #'s 164.35 HP 147.12 TQ