I have several paper air filters, most in poor shape, and I can't find a maker on any of them. The Ford filter is different. I have a K&N that isn't cut down and it fits perfectly. I have the number somewhere too. They show up in the catalogs from about 25 years ago and older, but K&N won't even reply to me about them. Be aware that the height of the filter is important. The original filters are only just over an inch tall. Most of them that are made to fit are 2" tall so they may still rub.
The finish on the one from the original poster is correct. I have seen them in red and unfinished as well. They are common air filter assemblies made by Segal, as stated, for Corvettes and Try Power GMs. The fact that they sell for so much is because people over pay.