Not sure on the size of the bearings but they are the same as any other motor bearings as far as I am aware.
To get the one in the endbell out take the o-ring out of the top of the endbell, and then the bearing should come out fairly easily through the top. The can is a bit less straight forward as the bearings tend to be really tight in there. You need to find something which is the right size to sit on the bearing from the outside of the can, and then hit it gently with a hammer. It's much better doing lots of small taps rather than one or 2 really hard hits.