V3.1 is the first public release of the extron scart input/output adapter cards and the accompanying autoswitcher board. The zips contain the gerbers for each. Please refer to each sub-project's readme for more details.
These boards are on the larger side for a service like OSHPark, so I'd recommend JLCPCB to manufacture them (or look on pcbshopper.com for the best deal).
For the autoswitcher, the code is available in the esp32-autoswitcher/code/ directory.