I made a MCSM Jack Rig! It's as accurate as I could manage.
If the eyes and nose aren't colored correctly, just open the Resources tab and replace the Jack model with Jack.mimodel.
It just wouldn't save correctly for me.
Also includes bonus cowboy hat! But you can turn it off.
https://drive.google.com/file/d/1g6iULzweJiy0Re1RrPUPOzI9Cj96KOKJ/view?usp=sharing
Credit not required. At least not rn. It's the only Jack rig out there.