Shenzhen Keming Industrial offers a thin MP3 player for OEMs with iPod nano measurements.
They even call the player "NANO 2" and provide a product image that has the same setup as one of the initial Apple iPod nano product shots.
This Nano knock-off is as thin as the Apple original. Its measurements are 90x40x6.8mm. The "NANO 2" features an 1.5 inch color OLED screen, FM tuner, MP3 and WMA audio file support, photo viewer, voice recorder and text viewer. There is no information on how much Flash memory can be configured.
More details on the Asian Products product catalog.
See also this story about iPod nano knock-off.
Don't Miss: The best Deal on a new Samsung Galaxy S8