All stl-files are free to download and can be found on thingiverse. The link to thingiverse is on this page somwhere left down. I made the mold using plastigel10.

STL-files can also be found here: https://www.thingiverse.com/thing:2838239

Fusion 360 source files can be found here: https://www.cgtrader.com/3d-models/science/medical/robot-hand-bionic-hand-prosthesis-prototype

video: