This is my version of antenna mount for GepRc DoMain 4.2. 
Don't know will it work with 3.6

GepRc unfortunately don't share files. You can only buy their prints in black for this model. (I don't like black prints on black frame).

This one is just antenna and elrs antenna mount. It is a little bit smaller than the original print.

On one of the photos there is an original black print.
 

15/05/2024 - added version with gps mount (18mm x 18mm gps)