Around here one can "borrow" these tools from Autozone or Advanced Auto Parts. (for a deposit)
While it's not recommended, I changed mine with a hammer and large socket set. I hammered the old bearing out with a large socket, then used the outer race of the old bearing to drive the new one in.
I say "not recommended" because the bearing has to go in straight and even. It's easy to screw it up with a hammer, so you have to go slow with a lot of little taps around the outside of the old race.