LOL
this is actually pretty common. Ford used to hot rivet the ball joints onto their lower control arms, and then only sell the arms, not the ball joints. This lasted until the first aftermarket mob came out with a ball joint kit that came with this natty little base plate with 3 holes in it. You just knocked the rivet heads off, the ball joint comes off the arm, and the new one slotted in with the holes in the base plate linning up with the holes left by the hot rivets that were removed.
Ford started selling ball joints on their own pretty soon after...
So, yeah, look to a R34 set up and you will find that some aftermarket mobs are bound to have what you are looking for.
(+1 on avoiding pedders stuff)