If your looking for an alternative to Crep Protect boxes, the Container Store sells pretty much the same thing for cheaper. $10 each or $55 for a box of six. : r/Sneakers
Upgraded collection with Crep 3.0 boxes : r/Sneakers
ORIGINALAB Premium Front Display Shoe Box Black | ORIGINALFOOK
Drop Front Shoe Box, 3 Pack Space Saving Shoes Organizers Boxes Stackable with Lids Magnetic Door, Sneaker Storage Shoe Box for Women/Men : Amazon.co.uk: Home & Kitchen