ELECOM Wii USB Adapter, Game Classic Controller / Classic Controller Pro to USB, Adapter for Windows PC for only one Player, 1m / 39 inch Length (JC-W01UWH) : Amazon.sg: Video Games
GENUINE Rock Band USB 2.0 4-Port Hub Adapter guitar hero drums Wii PS3 PS2 | eBay
raphnet. - Classic controller to USB adapter - V3
The Raphnet Wii Classic Controller to USB is the real del. It's seriously as good as a Wired Xbox 360 guitar. Legitimately buy one of these if you have a Wii Guitar.
Amazon.com: Wii Adapter Wireless Classic Controller To Pc Usb (mayflash) : Video Games
Amazon.com: Simply Silver - New Rock Band 1 2 3 USB 2.0 4-Port Hub Adapter PS2 PS3 Wii Drums Guitar Hero : Video Games