Finally found the right ball joints for the AVENSIS 2 on the third try
Ball joints with a cone size of approximately 18 mm at the top: TRW JBJ1079.
Ball joints with a smaller cone: TRW JBJ 1065.
Levers (2 pcs.) complete with ball joints (with a smaller cone diameter [approximately 15 mm at the top point] MS 36902/1-KIT-MS