http://search.harborfreight.com/cpisearch/web/search.do?keyword=Ball+joint&Submit=Go
I just did mine couple of weeks ago. Used the Harbor Freight one time use (as is most of their tools) ball joint press. I also got their master ball joint adpater set. Didn't want to be without the right adapter. The press is a big aluminum C-clamp. I used a big cheater bar. I highly recommend to use a big impact gun. The cheater bar put a lot of stress on the clamp and ovaled the threaded part of the clamp so by the time I got to the last axle u-joint it barely worked.
Not a bad job, just takes some torguing to get them suckers out and back in again. Good luck