Source for replacement axle bearing seals?

Does anyone know where you can buy replacement seals for 30mm and 50mm axle bearings? Some come with removable seals like ceramic bearings. I called the supplier of the bearings I bought with removable seals and they said I can’t get the seals separate of the bearings which is frustrating.

Is it allowed to run ceramic berarings. In sweden it says its forbidden

We’re allowed to run them for chassis bearings. Not for engine bearings.

BOCA Bearing would be a good bet for Ceramics.

To be clear, not looking to run ceramics, but I would like to have the removable seals from them so I can do my own cleaning/grease on my steel bearings.