For a vintage style hub (like a Corsair/P47, etc..) I like the TruTurn line. They have hubs as small as 1" diameter that use the regular TruTurn prop nut... no aluminum on the crank threads... and the "nut" mounts just like a standard TruTurn spinner, except it mounts to the front of the prop, centering on the prop washer instead of a backplate:

http://www.truturn.com/cgi-bin/store...inc=1a&maxp=30