There are several other wall switch housings for the Sonoff Basic on Thingiverse, but I didn't care much for any of them, so I designed my own and put it out here to increase the variety available. I started with 530_projects' version and stripped off all but the faceplate, and then reduced its thickness by 1/3rd. Then I added a button, sides, and a back. It is very strong - you can smack the button really hard and not break it, and the button travel is limited to keep from breaking the switch on the Sonoff board. It seems to work quite well!