Alain,
BMW did make new versions a few years ago. They went for 450-isch euro, and were sold out out within a year or so.
So yep, it is an expensive break up.
That's why, too late, sorry, the advice is to not have your tools in there while driving. I kept them in a tool roll from an old BMW motorcycle (you can pick them up for 20 euro or so) and then stick it in the storage bin next to the fuel filler hose.
I'd be interesed in your remains of the deceased box. I think i can use partS of it to fix other broken boxes i have; the plastic dissolves quite well and allows for strong bonds to be made.
I'll pm you.