Hello Jim4,
So that's the side shield for a small block radiator. I have never replaced those because all our Ford are FE's. However I do seem to recall those being offered when I was looking up replacements for the FE equipped cars. So it may behoove you to have a look through the usual sources like Dennis Carpenter, Macs and Obsolete Auto first. I can't say how the staples would be handled but on window felts that mount on the interior panel they usually provide new staples that you can manipulate into the old original holes if you wanted to go that route. However I just use soft aircraft solid rivets for baffling to install things like this and do not bother with staples. You could just nut and bolt it together as well if there is room.
Just thoughts.
Cheers