Handset Hook for your Computer Monitor.
Simply fix one of these to the corner of your monitor with double-sided tape or a 3M Command Strip, and you're good to go!
I created a version to support my Sony Gold PlayStation headset.
This required a much wider hook (about 2 inches) and more support to hold the extra weight.
There are 8 variants in separate STL files here
If you want to customize further the hook you can copy and modify the source models on OnShape.com Several of the dimensions are parameterized to allow for quick customization. http://tinyurl.com/gqrl2af
The author marked this model as their own original creation.