I'm using the Heatbed-Mount from Exclusive for my Raspberry Pi Cam on my Prusa i3 MK2.
I added a slim slot, where you can fiddle the RPi-Connectorcable trough; also a horizontal hole, that you can use to fix additonal cables with a ziptie - i'll add some LEDs for a better view of the actual print.
If you like to use the mount on the other side of the heatbed (in my case, mounted on the left side), you can simple mirror it (for example in Slic3r).
Additionally, you need to print the RPi-Cam-Case of Exclusive.