Using some double sided sticky Gorilla tape, this headset holder can be stuck to a variety of vertical surfaces. The Fusion 3D file includes a single parameter to define the width of your headset's head band that then extends or shortens the bridge, support struts, and vertical backplate.

In your slicer I recommend setting the struts and the lower part of the backplate where the struts connect to be solid instead of infilled to maximize structural support. YMMV without that – I've not personally printed it without solid support struts. I've included a 3MF file to demonstrate.