I bought an Atarimax SIO2PC a few months ago and searched all over for a case for it but I never could find one that fit. I tried making one out of Lego and it was sort of ok, but then I discovered that an Atari 2600 cartridge was almost exactly the right width and height for it. I dug out an old game that didn't work (Space Caverns by Apollo) and spent the entire morning hacking away at it with a Dremel. It took some work but I finally got it to fit and I have to say I'm very pleased with the result. Now I can keep it in my game case.