Well folks, having thought about this idea, I spent an hour in Ikea store in Bristol (a sort of retail maze) until I found them, and reduced the stock by one.
After taking some thought about the assembly I used some white glue to retain the boards.
Now has any one used the lid? I have thought about hinging it so it becomes part of the scene. Any thoughts?
The crane driver is looking just a touch bemused, as to what to do next?
At the moment I have know idea what I'm going to do in the box -- or maybe get one to go with it? (While there's still stock)