Those kits are still available from Mac's for $30 each.
https://www.macsautoparts.com/early_...build-kit.html
A brand new pump with modern design is $64.99:
https://www.macsautoparts.com/early_...build-kit.html
They also have kits for the later Flathead Ford 8BA engines which have the more modern style components. I wonder if there is any interchangeability with the 2 groove pulley pumps.
https://www.macsautoparts.com/early_...build-kit.html