WARNING!!: You will need to modify your Raspberry for this and I'm NOT responsible for any possible damage on anything!
Now that's out of the way, this is full set of Raspberry Pi b+ housing with camera housing and gimball setup.
Partly my own take on:
At first I thought to put these up on separate things as gimbal, housing for cam etc. but then decided that since they are interconnected it's better to keep them all under one "thing".. You of course can use any part of these that you need in your project..
Anyway, as you can see this "thing" is 3 separate things at one. All are modular. Print all or print what you need but for gimball assembly you'll need to use also my camera housing and for making it to fit Raspb you'll need use 3mm bolts from the top. so.. sorry :)
At normal servo centered pos. (camera looks out from the USB connectors at horizon level) the normal ribbon cable does not tear or anything with 180 degree servo movements. Ofcourse it's best to restrain that with code.
I have added ventilation holes on top of the main processors. GPIO hole might be too tight for actual connector so you might have to use some knifework to make it fit you need to use one..
Plenty of space around the other connectors.
The .INO code file added is for ARDUINO not raspberry.. this code written allows you to control this xy for test purposes only.. otherwise, use it with arduino as you see fit. The code is not perfect but it works ok and it uses this (or simililar) http://www.dx.com/p/repair-parts-replacement-analog-stick-module-for-ps2-controller-black-121340
You'll need (at least):
3x20 x4 with nuts
3x15 x4 with nuts
3x10 x1 with a nut
2x15 x4 with nuts
2x Tower Pro Micro servo9g (SG90) (or similar)
Please note: There will be lots of cleaning and drilling holes open depending on your machine and I'll hope that you have a general understanding on basics of 3d printing, electronics, mechanics and arduino/python before you attempt this..
Nothing special: print, clean, drill holes, add nuts and bolts, play :)