Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4320758.

I combined the two things and modified the Thule light holder, so that I could glue the phone holder to it. Really useful while jogging with the Thule Chariot with the jogging kit. I removed the screwing holes and the text in the phone holder with Meshmixer, because I could manage how to do it with OpenSCAD.

I only uploaded the mount part, because the holder is specifically for my phone with a cover. But you can modify the original phone holder to suit it to your needs.