I doubt it considering the fact that a quick look at Mountune's site doesn't show a strut brace for the Fiesta.
Overnight parts from Japan.
Edit: Looking at the application guide for the FoST bar does indeed include the FiST. Maybe its worth contacting them directly first to double-check? I think it's just an error caused by the fitment to the 1.6l Focus, but only they will be able to say for sure.