Visit the components page for a list of components to purchase: https://openmuscle.org/open-muscle-required-components/
All of the files for creating your own Open Muscle Band including the Gerber files for the PCB are on the github.
Wiring the Open Muscle PCB V 5.3.0
Printing The STL Files
The STL files are located in the github here: https://github.com/turfptax/openmuscle/tree/main/STLs