Summary

A generic small fixture for the small RX module that can be mounted either with a zip tie, on a standoff or with a screw.

Preferred material is TPU, and even better light TPU but it can be also printed with PLA.

Customization file also available

Tip for TPU. maybe it also works for you
My printer settings for TPU with this Extruder : https://www.aliexpress.com/item/1005005389239793.html

print speed : 35mm/s
print temp : 240C
print bed temp : 60C
Number of slow layers : 10,
all other settings like PLA

For TPU is also important to accurately adjust the bed using a sheet of paper as a distance gauge between the nozzle at home position and the bed in all four corners. Setting a bigger gap will cause the model not to stick and spaghettify in the middle of the print , setting it to low would cause the nozzle to clog and the filament to bend at the extrusion tiny gap.