Simply print your mount upright and don't forget to add support to make sure the holder-mount part is printed correctly. The examples shown in the pictures are printed using an Ultimaker-2 with a layer-height of 0,15mm
I am a 3D printing and 3D modelling enthusiast and like to share my ideas and 3D objects with the world.
I also make instructional video's that can be found on my own YouTube channel (Youtube channel: 3D intoFocus)