Hello Bret,
you wrote “P/N 437” - so you refer to the Strida 3 series manual.
As far I know it’s not impossible to find spare parts for Strida 3, but it will be difficult, the harder - or even impossible - for older versions.
Please consider that 1 and 2 versions were built before ~ 2002!
As the part number 437 is different from the actual 5 versions (449) I’d suppose that the bearings are not identical.
However, could you measure inner and outer diameter and width of your bearings?
Front and rear wheel bearings are equal on 5 versions - according to the part numbers on 3 versions, too.
And it would be great to see your Strida, maybe we can identify it…
Chris