Step 51: Camera Support: Overview.
My first book scanner was built from a Polaroid MP-4 camera stand. It has arms extending out, and I attached the cameras to them. Basically, I just drilled a large hole in a scrap slab of HDPE and then added an angle bracket to mount the camera. These aren't the best because they only work for my particular scanner. Regardless, I am including them here for posterity.