I am in the process of creating my own custom Wii U eShop that will effectively allow me (and possibly other users) to use the native eShop application on the Wii U to connect to a remote server that will be able to generate tickets, and install titles directly to the console. Just like the real eShop!!!!
I have already seen someone try to do this before, but is still VERY much a work in progress...
I will post more about my progress here once I get my Wii U replaced since my old one pretty much got bricked.