An old timer question

hotel magnum:
does anyone have a contact that would know what sizes the steering box bearings are for a 1946 Austin K2 that is left hand drive, as I have been asked by a Netherlands gent who is trying to revive a Birmingham Bedford, not as easy in the land of metric everything.

Id think they’d be loose ball bearings if they are anything like the Dennis steering box I did ,don’t the Bedford club know anyone ?