no, you have to ask, I know
www.v6mustangstuff.com sells some emblems with precut 3M on them (and its the thin stuff) thats where I got mine.
I would think that a few other companies might have the emblem you are looking for with a sheet precut. If you are having trouble, try checking a lot of classic mustang sites. I remember when I was looking for the emblems for my '67 I wanted the factory pin in style, and no one had anything but the 3m ones.
Yes the sticky stuff SHOULD be 3M (3M is a brand, its just automotive tape, but 3M is one of the most trusted)
As to the grill, it will work even though you have a grill delete. I fully removed the grill and then it bolts into the tabs where I assume the grill delete does from where your stock grille was.