3D print / DIY car mount

Hi all, after making a wooden dock station, I've been long looking for a 3D model or a DIY scheme on a car mount for Nexus 4, which of course isn't as easy as sculpting a wooden chip.
Ever had experience with this? Do you know of any nice, reliable and easy to make car mounts for this device?
I'm wondering if it might result in a cheaper yet equally reliable solution.
Thanks in advance for your answers.