I had the good fortune of finding a complete fan assembly. It comes with the hub, spacer and bolts. I am assuming it is a complete balanced assembly since it is NOS. PET shows all of the parts as one assembly. Rust never sleeps even with cosmoline. Have access to one more IF you want it.

Once the cosmoline is off, https://evapo-rust.com/ is pretty amazing stuff.

wow,,I just sold my 1964 911 nos fan alternator ass.. cool finding this stuff

This would need to be balanced with the other rotating parts, does not come "factory balanced"

I have used it several times, it is truly amazing stuff. Especially with the rusty parts these cars seem to get.

^ Just be careful to not leave something partially-submerged in Evapo-Rust for weeks thinking it will do a better job, it will erode a groove in the metal at the air/solution line. Limit the soak time, and be cautious of partial-submersion.