I was able to get some Disney Parks Droid Factory Mystery Crates, empty for less than $5 each. I just wanted the crates, forget the droid. So they came in today, and I wanted to see if I can paint it without having to mask it. The translucent panels do pop out, making painting easier, however the printing they did on it is really thick and should be sanded off before painting. I might paint one or two solid, and see how it looks. You could put a light inside to give the blue walls that illuminated forcefield whatever look.
The bottoms have holes and pegs, so they can lock in side by side, and they can be stacked. The blue smaller panel with the droid silhouettes says "Mystery Droid" in Aurebesh. Pretty cool little crates.