Master of Illusion came in a regular DS case inside the cardboard box... I should know, I bought three copies of it. 
I know, but I hate back covers with no text on them, so I would replace the back of the cover with a scan of the box.
The down side about MoI is that the cover is printed in metallic ink (or something similar) that would probably make scanning it a pain.
Hmm, didn't know that. What about one of the PAL versions then? Can you scan your box for reference, then maybe it can be re-created with a PAL version scan?