You guys are going to laugh at this but this NH 268 baler plunger scoop has about the same dimensions as my A&A 7" Grump Lump scoop. These balers were made '64 to '68 in New Holland PA, not far from a little shop in Malvern so I'm beginning to wonder if old Bill got an idea from when those balers being shipped out.
Trim some from the bottom or flange it to get the correct height and lower the top back portion 1/3 down a little bit and it will be close. The side edges around the perimeter of the scoop are not as rounded as the A&A. The metal is very thick and would be easy to work with.
Buy some Hayliner 268 decals from the local New Holland farm dealer and..well never mind.....