Don't know if your a fan of FaceBook, but there are many brand specific pages there, and seems someone is always looking for something. On the other hand, if a person has a couple of a particular model of anything, doesn't hurt to have some spare parts for yourself.
I bought a BN Farmall nearly 40 years ago off a guy, that had the parking brake tang released, when setting on a hill. Rolled down a hill, hit a tree, and broke in 3 pieces. Brought it home, tore it downscrapping broken castings, but kept many usable parts, as they fit a few other similar tractors I have. I'm still picking over the parts.