I don't often use NAPA for parts, the local one isn't very good and the online catalog is awful. I did find those rotors still readily available on Rock Auto.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more... It's true. I really don't do anything but browse the Internet looking for trouble...