Not sure if you've tried, but if you're on O3DS 10.3.0-28U, the eShop opens up no problem. I'm able to do this through both Ironhax and Oothax. Just to be sure, I used smea's eShop spoof to download Pokemon Picross, and it worked just fine.
I kinda like the idea of this. Hey, I'm a graphic designer, mind if I have a go at making the icon? It would help more if you had something in mind for an icon, if not, I can manage on my own.