I've only seen Camber adjusters which go around the ball joints or Excentric Radius arm bushings (used for caster correction).
The caster adjusters are made by moog and aren't normal RA bushings. The hole is off center and you can rotate it to lift it up or down some. If you go off road don't both with them. I've shattered two sets. I now just live with the caster being off and use Moog Problem Solver rubber RA bushings.
~Mark