Amazon has listed the Hori Mario Kart 8 Racing Wheel Set, which you can preorder with this link. You can also check out the packaging below this paragraph.
Blaze through Mario Kart 8’s exciting courses with this set of two colorful and comfortable racing wheel attachments. Simply pop your Wii U Remote (sold separately) into the racing wheel attachment and enjoy more realistic control and better grip. Each wheel is also equipped with a button on the back of the wheel for easy access to the B button during gameplay. Featuring Mario and Luigi themed colors and logos, these racing wheels are perfect for Mario Kart fans! Officially licensed by Nintendo and match perfectly with the official Mario and Luigi Wii Remotes released by Nintendo (Not included).
The Hori Mario Kart 8 Racing Wheel Set is expected to come out on the 26th of February in the North American region.