All other parts can be found here:
https://www.thingiverse.com/thing:4552496/

This remix of Sneakypoo's PCB vise uses a modified bracket that can be used with a modular mounting system (GoPro-style mounts).

This allows you to use any combination of arm lengths or mounting options. I added a swivel mount that allows me to position the work piece in any orientation.

A combination of "things" were used to make this.

Main PCB vise parts:
https://www.thingiverse.com/thing:4552496/

Remixed PCB vise bracket:
See files.

The modular mount is attached to the top (or bottom) of the vise bracket. I would have preferred the mount to be on the backside but this option helped in minimizing supports. I opted to go with a three-tongued attachment instead of two. Keep this in mind when choosing your mounting system. There are plenty of "axis changers" or "tongue adapters" available.

Modular mounting system:
https://www.thingiverse.com/thing:2194278/

Swivel mount:
https://www.thingiverse.com/thing:685440/

Base mount:
https://www.thingiverse.com/thing:4552503/

The base is made of 5/8" wood to add some weight.