Struggling with a bulging camera on iPhone 6 >?

Question

iPhone

The idea came to mind that in order to prevent the iPhone from rocking when you put it on the table in front of you and press on the upper left side of the screen, you could stick some kind of overlay made of pleasant material, the thickness of the bulge of the camera, but covering only the upper part of the back panel. Has anyone seen this for sale? If not, what are your ideas on how to implement it yourself so that it does not look flawed? The thickness to be compensated is about 0.7 mm
Idea picrylated