US made bearings are harder and harder to find.
That being said, are your wheel bearings really in need of being replaced? Have you inspected them closely. Just because they're 70 years old doesn't mean they're bad. If they've been maintained and adjusted properly, they are likely still serviceable.
Nice looking engine and the stand. Good use of that perforated angle.

[on edit] Jon beat me to the punch on really needing to be replaced.