Such graphics are available with Autographix. Any accessory shop dealing with its product will be having it. But imo please stay away from them as they do not really go well with plain looks of Fiesta. Just my personal opinion.
Are you sure they will look good on the fiesta?
Better get a PS job done, so that you come to know how they look.
Any guy expert in PS can add swift stickers in the fiesta.
IMO, the fiesta is plain classic, and maybe not look well with the striking and flashy stickers. Try a flame like sticker (Shown on a Lancer in Nokia Asha ad) starting from front wheel, maybe that would look good.