Nope, don't have the e-Reader box. ... Not even sure where my e-Reader
is at the moment, now that I think about it...

Edit:
Well.... Sometimes I just make more work for myself.
I had a thought run through my head of "Gee, I wonder how the Chamber of Secrets book cover (US version) would look thrown in the 3DS template? Surely better than the game's retail cover..." But I wasn't able to find a reasonably sized image of the book's original (US) cover. What I did find, though, was the very large preview image of the upcoming 15th Anniversary cover, and throwing that in the template.... was a perfect fit.

I haven't put the back together at all yet, but it looks like I'll be going the custom cover route for this game.