Well, depending on what model your tablet is, there may be a solution at the XDA-Developers forums, but it will most definitely involve reflashing stuff and warranty-voiding maneuvers. There is a way to download android apps to your computer directly, it's a Chrome plugin called APK Downloader. You'll need to do some extra steps after installing it, but I've used it with success to sideload Netflix and such to my rooted tablet. I'm not sure how well it works for paid apps, though.
Member, MMMSClub, CMASS
Programmer, FTC team 5818, FIRST Tech Challenge 2012-13 "Ring it up!"