Long story short.... you can get .tik files using FunKeyCIA or CIAngel both by
@cearp
Directions for FBIv2.0-2.0.5:
1. Have FBIv2 installed on your 3DS.
2. Have the .tik file of the game you want to download somewhere on your SD card.
3. In FBIv2 select the SD option and navigate to where the (Gamename).tik file is located on your SD card and install it.
4. Visit the eShop on your 3DS and use the searchbar to find your game.
5. In the games page it will have the option to redownload.
6. Redownload the game!
Directions for FBIv2.1:
1. Have FBIv2 installed on your 3DS.
2. Have the .tik file of the game you want to download somewhere on your SD card.
3. In FBIv2 select the SD option and navigate to where the (Gamename).tik file is located on your SD card and install it. Keep track of the title ID for the ticket you just installed.
4. Still in FBI navigate to the 'Tickets' option and find the Title ID of the .tik you just installed.
5. Select Install from CDN!