I dont think there is an actual tool for removing pressed bearings. Get a piece of wood or something soft like that ( dont use a screwdriver ) that fits through the centre and can be angled to sit on the inside edge of the bearing. Take care not to push on the shield or you might bust it.
Angle through the hole and use a mallet or hammer to gently tap them out a bit at a time. Just work round clockwise and it will slowly come out. If they were greased going in they shouldnt be too hard to get out.
I have a piece of dowel about 9inches long for doing this.
Good luck. Patience is the key.
Marc