If you have a parts jobber such as NAPA or Oreillys etc. near you that has a Knowledgeable parts man who may be knowledgeable with these old trucks he may be able to fix you up. A few years ago I needed a hanger bearing assembly for one of my trucks, I think it was my '63 C-60. I went to Pronto Auto Parts and told the boss what I needed. He said I needed to tell him the ID of the bearing. He said it would be 1 of 2 sizes he mentioned, I don't remember the sizes now. Anyhow I went home and measured and sure enough he had the carrier bearing assembly on hand.
FWIW my other truck is a '58 Chevy Viking 60. As my username 58n63 suggests.
