Prusa MK3/S/+ Bear Exxa Pi Camera Mount

I had a friend that wanted a Bear version of this camera mount, so I got to work editing for the new geometry. This doesn't move the camera too much from it's original position, so it shouldn't throw anything off. This also fixes the mounting for the camera to use M2x8mm screws instead of hoping the press fit parts don't snap. Also, yes, I know it's not the real Bear logo, but I really don't like that gummy bear logo very much.