Sorry to resurrect an old thread.
Are the BMW 'din' sockets different from any others or will searching for 'motorcycle din socket / usb' be good enough?
I just want a small usb socket similar to the one posted on amazon but not angled ideally, not sure if it has to be BMW specific as I've never used these type of sockets, my last bikes were hard wired using a different box - usb thing I've got