My hub search/research has been solved, thanks to Chuck Schmidt's catalogue series.
It is indeed as I suspected, the hub details clear to see the spacers on the spindles to make the fork tip interface with cones nice and solid.
Hubs are called disc adjusting and listed in the 1931 catalogue, models 40 & 45.
Hope someone can help with a source for these parts, otherwise, it's off to machine shop.
Ted Ernst
Palos Verdes Estates
CA USA