Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5029264.
Scale for your 3d printer to fit it . You can attach it to the wall with double side tape or something like that. You can use dremel to make small hole on the back and small slice to use a small nail .
You can watch how i made it here https://youtu.be/5xcGg27k_xU