This STL file is an easier alternative to the "side pods" for my full Black Widow Civil/Infinity War Bites. It replaces all the "pod" files, which means that instead of over 100 parts to assemble, you just print a number of these pods and then a few main pars (two bridges and the box parts).
Assembly is done with elastic strap or cord. I used 5mm wide elastic in the photos. The straps should slide OK through the opening in the bridge part, but you may need to use some glue (epoxy or hot glue should work) to fix them in place. Slight modification of the box parts may also be necessary to attach the straps to it.
These pods can not be used with the LED strips in my original design, but they are hollow and have an opening at the end and on one side, so if you have LEDs small enough, it should be possible to add wiring, resistors and LEDs to light these up. You can still use the main box from the original design as a battery holder even if there's no Arduino board.
If you don't care too much about 100% screen accuracy, you could also build widow bites entirely out of these pods.