Based on your mention of camber bolts, I presume you are AWD? You are going to have a hell of a time finding some of the suspension parts for the rear end if you are AWD. FWIW, Toyota generally calls the knuckle a spindle, so you may have better luck searching under that.
Just as a reference, the rear suspension set up on the 03-06 AWD Vibe was used on the following vehicles:
99-06 Celica GTS*
*The Celica GT of those same years miiiiiggghhhttt have the same rear knuckle/spindle.
03-06 AWD Vibe/Matrix
09-10 AWD or GT/XRS Vibe/Matrix**
**No confirmation if the setup remained the same on the 11+ AWD or XRS Matrix (the Matrix remained in production until 2013).
This is supposedly a fit for the Celica GTS. Toyota part # 42304-20330.
https://parts.manhattanbeachtoyota.com/ ... wtbDQtZ2Fz