To run crocodile hunter you will need the following hardware. This is not necessarily an exaustive list of all the hardware that will support crocodile hunter. It should also not be construded as an endorsement of any hardware or online store by EFF or any project contributors.
You will need a reasonably modern laptop preferably running ubuntu. You can also run crocodile hunter on a raspberry pi 4 running ubuntu or raspbian. https://www.amazon.com/Raspberry-Model-2019-Quad-Bluetooth/dp/B07TC2BK1X/
Any USB gps dongle that works with GPSd will work here. https://www.amazon.com/GlobalSat-BU-353-S4-USB-Receiver-Black/dp/B008200LHW/
Any of the following radios have been tested and known to work with crocodile hunter. Other radios that work with SRSLTE should work but we haven't tested them. The radios are listed in order from least expensive to most.
Any LTE antenna should do. https://www.amazon.com/gp/product/B06W9MZQBN/