I bought my balljoints from autopartsworld.com they had the cheapest price I could find on Sankei/555 parts (listed as Japan as brand). I know Moog uses them for some of their parts, not sure about ball joints though. Has 555 stamped on them. Mine fit perfectly. And they come with grease fittings what a concept.

A couple things to plan for. If you use a pickle fork to seperate it (was the only way mine seperated) get a good one from sears for $5 more then the auto parts store sells. I first bought one from checker auto and it bent around the shaft of the ball joint, was fun to get out again <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> I also broke 2 cheap harbor freight 3 jaw pullers. Didnt break my sears one but it wouldnt budge the joint even with heat. Also beg or borrow a torch. I pounded on the knuckle on mine for a few hours trying to get it to seperate (3 lb sledge) then finally decided to break company rules and had a neighbor drive me to work so I could get the 'b' tank turbo torch from my service truck. A few minutes of heat then use the good pickle fork and it popped right off.