Hi Dan,

When I answered this I did not notice it was in the Modem category not the Underwater GPS. Here is the answer for the modem:

The Modem-M64 is available in the store and we have:
* STL/STEP files available to ease hardware integration (CAD, 3D printing). They can be downloaded at the product page: https://waterlinked.com/product/modem-m64/
* Python library which includes a modem simulator allows testing and development of software interfaces/protocols etc without having hardware. It is available here: https://github.com/waterlinked/modem-python

BlueRobotics has tested the modems and written a small summary of their experiences here: