After successfully capturing images from my OV5642 module, I decided it was time to build a camera mount to (eventually) hold all 8 cameras. I used OnShape, a free and easy-to-use online CAD program to design it. The result is pretty bare-bones for now, but it sits on top of the development board, holds all the cameras in place and gives convenient access to the camera wires and board pins.
I got it printed for only $9 in a couple of days by a nearby printer using 3D hubs. Here's a link to the public document in OnShape, in case you wish to print or modify it yourself.
I then used some old ribbon cable and quite a few female headers to create the monstrosity that is shown below.