I used a Raspberry Pi Model A+ because it's the smallest pi with the camera interface. The frame is made with Makerbeam, 4x vertical 66mm beams and 8x horizontal 54mm beams.
Raspberry Pi camera mount 3D printed from Shapeways.
DWG CAD files are in hardware/cad-files or you can see models here on Spaceways:
https://www.shapeways.com/product/K6FLBY3SW/raspberry-pi-camera-module-makerbeam-mount
https://www.shapeways.com/product/F4268ZMG5/raspberry-pi-pir-sensor-makerbeam-mount
The camera mount supports both the V1 and V2 camera modules.