Ok so the combination is:
- This camera board
- This external antenna
- This project
- A shell I designed myself in SketchUp (skp download). Note that's not the final version, as I lost some design files.
And the finished item:

All assembled, they will give a decent enough feed to frigate for the basics. Just don't expect miracles in the resolution or framerate departments. 3fps does fine for my use case of tracking critters.