They’re a fairly standard size, it should be printed on the plastic cover, I replaced some recently but can’t recall the details. There were no special ‘Bullseye’ branded bearings as far as I know.
I do/should have some washers from a 126 or 130 rear axle. I need a 135 so these are surplus. I might be able to help with the bearings but not sure till I check. PM me if interested and I'll have a look when I can