The camera mount included with the Blink set is quite clever, in that it can be adjusted to cover most angles, but perhaps it just doesn't look so cool to me, so I decided to design and print my own mount based on the classic spherical bearing mechanism, just because ;)
Even though I made this specifically for the Blink cameras, nothing prevents you from using it with any other camera or thing. Just make an adapter that can be screwed or glued to the arm of this mount and voilà !
As usual I'm including not only the STLs but also the original SketchUp project file, so feel free to modify it to your liking (eg. maybe you need a larger arm, or a larger contact area with the wall). Commercial use of this model is explicitly forbidden by the license though.