I am enjoying this whole discussion, so thanks to everyone who has chipped in so far.
As it happens, I do have a virtually new set of 700x30 studded tires, which I have never used because my Univega has 27" wheels. I had been thinking I would buy an IG hub and spokes and build up a new rear wheel using the current and apparently indestructible Araya rims, then throw on a pair of 27" Paselas I also have on hand.
But I'm now I'm beginning to think that it would be worth going to 700 wheels so I can use the studded tires. One option, instead of building up the wheelset myself (I have built many wheels and enjoy it, within reason), would be to buy a complete wheelset with hub, like this one:
https://www.amazon.com/Mercier-Nexus.../dp/B07HYF2XG3
Basic made-in-China quality, probably, and so nothing to write home about, but the price is right. I have seen hubs alone advertised at about the price of both wheels, so if I need to rebuild them on different rims later I wouldn't be out of pocket by much.