I recently purchased Moment's 3D printed stick-on mount (M-Series) for the Pixel 7. I did my best to reverse engineer it, and it is very close to Moment's mount. I've tested the part on my phone and was very happy with the results. I posted a STEP file as well so feel free to remix or modify to your liking.

The stick-on mount fits perfectly with the Moment Pixel 7 mag-safe case. I am not sure how the mount will fit with any other cases. Also, the Moment mount comes with a 3M VHB tape. You will need this or something similar to stick the mount to your phone.

Feel free to reach out with any questions or suggestions. I'll try to answer them as best as I can. Thanks!