You only need a few tools to get the bearings out and back in.
-Vise
-Big hammer
-Brass rod
-Appropriate sized circlip pliers
-Length of pipe- preferably PVC (not shown)
-Couple scraps of plywood to hold the tube in the vise
-Big screwdriver
Ignore the dark steering shaft next to the plywood scraps in the group above. It's not a tool!
The brass rod is used to drive on the steering shaft so you don't ruin the shaft with your hammer.
The length of pipe (I used steel, you use PVC) is used to drive the upper bearing in place upon reassembly. The pipe must be a diameter larger than the steering shaft but smaller diameter than the upper steering shaft bearing.
The screwdriver is used to drive out the lower bearing after you get the upper bearing and shaft removed from the tube. Use the handle of the screwdriver on the bearing and lightly tap on the driver side of the screwdriver to slide it out.
A parts diagram is helpful (since I didn't take pictures of every single part and step along the way) to see all of the parts comprising the steering column assembly.
So how do you get the bearings out?
1. Secure the column in the vise with the lower bearing side of the column (the side that would have the u-joint, not the steering wheel, attached to it) facing up. You're going to drive out the upper bearing first. Make sure the vise is tight (but don't gorilla tighten it and bend the tube) so the column won't slip out. You don't want to bend those hangers for your wiper and turn signal stalks.
2. Remove the circlip (#4) from the u-joint end of the shaft. Put the brass rod on the steering shaft and drive the shaft all the way down the tube until it pushes the upper bearing, with the shaft, out of the tube. You should now have a tube that looks like this:
See that seat/flange inside the upper part of the tube? That's why you can't put a replacement bearing atop the worn one.
3. Take the outer circlip (#5) out of the tube at the lower bearing end. Flip the tube over in your vise so you're now looking at the steering wheel end of the tube like the picture above. Insert your big screwdriver (handle first) and drive out the lower bearing. It should slide out easily.
Now you should be looking at a tube like this:
With no bearings or shaft in it:
Take the lower bearing
and regrease it if you want to. Use something durable like wheel bearing grease. To get the old grease out, soak the bearing in gasoline for a while and swish it around. To regrease, I used a oral syringe to inject grease into the bearing races.