Front wheel bearing hub -can I replace just the bearings?

I am planning to replace by front wheel bearings and it appears that they are normally sold as a hub assy. which is fairly expensive.

I have a 20 ton press. Is it feasible to replace just the bearings?

If so, any idea how difficult it would be to do?

Part #, and/or size of the bearings?

Source for the bearings?

Never seen it done. Don't know of any suppliers for parts as the hub is listed as non-serviceable.