Coroplast 
Cubes 
Hay Find Near Me
Review Detail
Reasonable Price
Overall rating
4.3
Availability
5.0
Selection
3.0
Pricing
5.0
They were the only store in the area that I could find that still carried the cubes with 1.5" or less opening. Not enough connectors to make a 2x4 but I was able to "make more" by cutting 4 of the connectors in half which ended up working quite well. Only available in black.