These fit:
https://www.amazon.com/gp/product/B01411TB44/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Just got mine yesterday-- they do NOT fit my unit. Did a 'dry' trial on every one of them - they fall right out. Luckily I also bought one of the Belkin cradles - the scroll wheel on the back of the dock controls how far the usb connector sticks out.... It works fine. Just wanted to post a warning, that maybe they changed these a bit....they seem like nice cables, but probably not worth sending them back, due to the low price....