Good luck with that. They had to really rework the nose piece - most of the frame stays the same, but the front nose gets new lights - cowl - valence - skirts - fenders - bumper - hood - the whole 9 yards - might be cost prohibitive to accomplish but if money is no object, just get a rear-end damaged Fiesta from a wreck yard that has the "Ashton Martini" look you'd like - then begin the retrofit process.
This does affect the radiator too They had to reposition some of the supports which if I'm not mistaken - changed the Radiator which means that number you order to replace it with.
The previous had a Ztec motor, while latter models dealt with Sigma - affects hoses needed to that retrofit.