Just shared a simple EOT design on Thingiverse. https://www.thingiverse.com/thing:3742667 Enjoy!

And for those of us without access to a 3D printer, how much for a couple of those housings?

Bill, these things are found on Thingiverse.com, and can be printed for free if you have access to a 3D printer at your library or community college. You could also have it printed by someone who owns a 3D printer. It’s almost become a cottage industry, printing things for other people. Or try Hacker Labs – many cities have them. A guy came into our 3D lab in Sacramento’s Arcade Library and printed some end of track devices and a large scale street lamp from items on Thingiverse. Just don’t give up, their search engine isn’t very good.