1934-35 front hub/drum source?

[dumb person]

I am told the cast front hub-with-drum with ribs on the edge is from 1934-1935.
If this is true, are these available anywhere? If not, do 1940 hubs bolt onto original spindles without any modifications or special bearings?
Bearings seem hard enough to get out here as it is.

All the places i looked online seem to assume people are fitting much later model parts instead of original.