You can purchase HamShield (as well as smaller variants or LoRa version) at http://www.enhancedradio.com/
HamShield1.0b Hardware
These are the hardware design files for the HamShield1.0b electronics.
These hardware files were created with KiCAD.
You may need the KiCAD libraries available here: https://github.com/mogar/KiCAD_libs When opening these projects in KiCAD, you may need to change the path to the libraries from the above link. This can be done in preferences->libraries in both the schematic editor and the layout editor. Make sure the libraries noted there point to wherever you put the above KiCAD_libs repo.
The Arduino Library for this project is available here: https://github.com/EnhancedRadioDevices/HamShield