Design of wall bracket for pan tilt mount for stick up cam

The provided wall mount bracket has a drop down angle of about 15 degrees. This means that when you pan left or right the horizon of the camera picture does not stay level or parallel with the actual horizon. There needs to be a wall mounting bracket that holds the base of the pan tilt mechanism level. Has anybody found a better bracket or maybe a "wedge" to put between the provided wall mount and the mount surface so the camers is level at the base?