This is a remix of 2BK Microphone clip for Teufel AC 9050 PH. Shout out to him for providing the CAD files.

I did edit the dimensions of the mic and headphone clip/mount so it will fit mine.

Measurements

Mic: ZM-MIC1 with 10 mm diameter
DT 770 Pro: 6x10 mm ellipsis
cable: 2 mm

Note

I'm not that experienced with CAD-Software so you may be better off downloading the file from 2BK and start editing from there: https://www.thingiverse.com/thing:3439142
I did tinker my way through to achieve what I need.

I needed to heat the mic clip part so it would fit my ZM-MIC1. I'd change the diameter of the mic clip if I print it again to approx. 9.8 mm.

Printing

I recommend printing it with cable duct upwards with more support and brim for maximum adhesion for the headphone clip part.

Print with support and 100% infill for maximum strength.