I found what I believe is the removed bearing (not absolutely sure). It was 40mm OD x 18mmm ID. I believe it must be a metric bearing since both OD and ID were exactly mm increments.

Removing the bearing from the shaft required cleaning the rusted shaft, polishing w/ fine sandpaper, and pulling w/ a 3-leg bearing puller. I had to seek help as I did not have this tool myself.

good luck