Why stick with USB? I wanted to reduce the amount of adapters too, so I
went bluetooth.
http://www.shopcell.com/All-ALL-Blue...FQxsGgodEB01ew
But, they don't fold well (not at all).
There is this though:
http://www.amazon.com/HTC-Stereo-Han...AYWDM60XKR13QH