Anyone seen one of these around, know if they even exist? The standard USB cable is really short, awkward to play whilst plugged into mains. Would like to get some sort of USB extension cable, however because its sort of proprietary both ends of the cable (the USB end has notches that prevent regular USB cables being inserted into the AC adapter) its looking like something specifically made will be needed.

Ideally what I'm looking for is the male proprietary USB one end, and a regular female USB the other.