That is why I make my own plastic boxes.
Buy a Sheet of .08" ABS Plastic and get some "MEK" (Methyl Ethyl Keytone) A 4 ft. by 8 ft. sheet isn't Cheap, But it Makes a LOT of Boxes.
ABS is Available in Many Thicknesses and Colors, but the .08 is a good thickness for small boxes. As to Colors, White and Black are the Most Common. Other Colors will Be Considerably MORE Expensive.
Cut the ABS into Appropriate Sizes to make the box you want, by just Scoring it with a Razor Knife, Than Break it. Simular to Cutting Glass.
The MEK is a Solvent and actually Melts the ABS Together.
Use a File to clean up the glued edges.
With a bit of Practice, they can look pretty good.
Take care.......Gary