I stopped by the BikeTopia co-op in Berkeley this evening to see if they had anything for the project. They didn't have much, but they did have a 1962 AW hub:
It's missing its oil port fitting, and it's a 40-hole, but at worst I'll get the experience of rebuilding this one... I've never had one before. If I can find a 36-hole one, awesome. If not, 40-hole 650b rims are a thing. An over-a-hundred-bucks thing, but it are what it are.
--Shannon