I bought a two sets of wiimote, nunchuck and motion plus from ebay (HK based sellers) and they come with the sleeves. I was half expecting them to be fakes because the prices were really really cheap.
There are certainly physical differences when compared to my original US and Korean sets (the HK ones have different printing quality, generally looser B buttons and battery covers)- but what do you know, they actually work like the real thing. In fact I am having more issues with my US controller which keeps getting wrong movement responses.
Wii Remote + Nunchuk ( FAKE ? ), Pictures Side by Side