Thanks to all (at least half-a dozen offers!)who responded to my request for McCauley hubs.
Found a set on the field. One of the guys at Creve Coeur had switched over from McCauley to Clevelands and had tossed the hubs into a surplus pile at the back of his hangar. I didn't have to worry about shipping cost and times, and the wheels look as if they came straight out of the box.
Thanks again for all who offered - it's things like this that make this club great.