so you look for a Wii Classic Controller Adapter for Wii U and Wii? Uhm, if you connect the CC to the Wiimote you can use the CC on Wii and Wii U, right?
Or are you looking for a way to connect Wiimote and Wii U Controller to PC? You can connect them easy to a PC via Bluetooth, also the Controllers that are connected to the Wiimote.
edit: Or are you looking for a CC Adapter to PC from a different Brand, not Mayflash? ^^"