Hey, Cy! Wow, I guess I need to check in more often. ;D
The box was "original" to the boat. I acquired the boat from the company I work for, who acquired it from the original owner, and it's always been there. Has a drain built in that exits a thru-hull. When we painted the boat we painted the box, too. It's pretty heavy duty. Wish I could tell you where to find one like it.