Originally, we were planning on ordering enclosures and modifying them for the card readers and LEDs. However, I was walking through my local home improvement shop and noticed a 2 gang electrical box. Thinking to myself I bet I could make everything fit in that box.

I grabbed one, brought it home and with the help of the 3D files available on the McMaster Carr web page I was able to CAD up a box:

Yes, I use OpenSCAD. I'm a Sofware developer by day, and the tool works with the skills I already have. If you are keeping score, I use both OpenSCAD and Fritzing.

I was able to model everything inside the box with enough space to spare for wires and power. This should work, be off the shelf, available to anyone, and be cheap!