In 2022 when I started with 3D printing, I wanted to mount my Asus wireless router on the wall. I only found one wall mount, but I really want an easier one. So I took some heavy Inspiration and made a two piece mount from 'scratch' in Tinkercad. 


Part 1 goes on the router, no screws required. Part two goes on the wall with 3 screws. 
Be gentle with mounting the part on the router, you need some force if I am remember it correctly. Use it on your own risk of course.