Ill be really surprised if they do the work themselves and dont sub it out to a local company. I dont know that Ford would do it bumper-bumper, Ive only seen them do hood-trunk lid. Any actual company should be able to cut vinyl to fit any pattern you want. Any actual painter company should be able to do the same.
http://bradbarnett.net/mustangs/time...05/stripes.htm
if you just want a reference point.