Don't know if you ever found an answer. I had to a lot of digging and finally found the sad news, made in China. The link is a picture of the crate I found.
http://www.nhproequip.com/content/images/thumbs/0008032_extreme-tools-rx722519rc-roller-cabinet-tool-box.jpeg
Hi guys, I'm new to the garage journal. I have been doing some research lately and purchasing a new box. I currently have a Mac Tech1000 50" top and bottom and thinking about selling it and getting a 72" roughly, bottom only to have a workbench. I don't mechanic anymore, well with my tools...