I successfully casted a base from a 3D print over the summer. I also printed some eye blanks. I am still working on an inner mold to reduce foam usage. I have a few more techniques I want to try out before I settle on what I like.

-3D printed Eye Blank by me

-Initial 3D head base model provided by openkig.com / facebook.com/openkig and modified by me

-mold casted by myself