Here is a simple module case that fits well in a Turnigy or Graupner radio.
I also designed a top cover for FrSky to fit the DIY module: You have three holes specifically made: One for the mode switch (switching between one way and telemetry), one for the led and one for the push button.
Any SMA male antenna plug should fit well.
Edit1: New version with thicker antenna hole due to proximity with the radio back cover problem
Edit2: It seems that module housing is not exactly the same between manufacturers (at least between FrSky Taranis and Turnigy 9XR), so I designed 2 module lenght:
- 59mm lenght (suitable for Taranis)
- 60mm lenght (suitable for 9XR)