Here is the most complete Wii case cover template if you want to make your own, also include a template for a dvd wallet that can hold 2 disc per cover art.
New Sample V6
Sample of my game wallet
New Templates V6 get it here Both template in the file are in blank so you can make your own.
The images here are samples you have to download the template package for real resolutions and size.
Both template are 300dpi and 3240 x 2175 / 538 x 750 respectively.
Now including layers for:
All controllers option (balanced board, wiimote(1,2,3,4), nunchuck, wii wheel and classic controller)
Back/front ESRB badges (Entertainment Software Rating Board logos)
Front PEGI badges (Pan European Game Information logos)
Game Publisher logos
Editable UPC space
Search for Wii games UPC# for the back(if you're that serious designing a cover)here info: the upc in the cover template is 0, so you can add your own