I decided to make another OrangeRx transmitter antenna mount. It supposed to be glued on stock back cover and not close pins for programming. It has maximum height to be fit without problems.
Thing consists from two parts.
First, disassemble transmitter and carefully disconnect coaxial cable from PCB.
Screw SMA female connector into part #1.
Holding part #2 at right top corner mark center to make a hole for cable.
Drill 4-5 mm hole on back cover.
Glue part #2 to part #1. I used Ca glue. Then glue assembled holder to back cover.
Firmly connect coaxial cable back to PCB.
Return back cover in place and screw it.
You are done!
First mount module in transmitter then screw antenna on it.
Part #1 should be printed up side down. Support is lines 20% for part #2 only. Could be probably printed without support if print back side down, not tested.