Its the cover highlighted with the red circle in the main picture.
Wii Rubber Feet Replacement for Nintendo Wii Console Silicone Set White/Black
Nintendo Wii Console Door Cover Kit Flap Black Replacement Panel Covers Set of 3
Nintendo Wii Console Door Cover Kit Flap White Replacement Panel Covers Set of 3
Pair of Genuine Nintendo Wii Console Port Door Covers in White
Nintendo Wii Console Door Covers Flaps Replacement Panel Set 3 Piece WHITE
Replacement Casing / Shell / Case for Nintendo Wii Console - Pick Your Colour
