Valve just dropped everything new Steam Machine owners need to make their own e-ink faceplate, and the timing is impeccable. Right now, the cube is landing on the doorsteps of early adopters around the world, and I've no doubts that some of them were originally lured by the "inkterface" and its papery stat screen abilities.
The freshly uploaded Steam Machine Inkerface kit includes 3D print files, a complete bill of materials, and instructions to guide you through making the e-ink panel (thanks, Brad Lynch). There's even a video detailing the process step by step, providing invaluable steps that should help make some of the steps, like soldering wires to its Adafruit brains, a little less intimidating.
