Well a bit of scrounging around yields up these front hubs and perhaps a rear cone from an old French hub.
Plenty of front hubs available.
This is from a standard French rear hub that is being scrapped. Cone size is 17.5mm outer diameter, 12.5mm inner race diameter, and 12mm in height.
There are likely some innards from a Tippo hub here in the Way Back archives. Smiles, MH