A selection of Lego CCBS compatible pieces. Attached pictures show examples of Bionicle MOCs build using these 3D printed arms and legs.
I recommend to print in PETG (this is what I've tested).
UPDATE.
After few months the sockets got a bit loose. To avoid material creep I would suggest trying printing these out of ABS or ASA.
Print with supports in supplied orinetation.
For best results use 0.1 mm layer height and 100% infill.
The author marked this model as their own original creation.