[sdiy] OT - help me ID this USB port?

[Julian]

Im still working on my car stereo, and find that the usb port is not your usual micro 'b' port, but some other, possibly
proprietary, socket.

If I knew what it was, I may have some hope in finding a cable for it.

Theres a photo here - 

http://www.port23.co.uk/usbport.jpg

(the manufacturers don't seem interested in supporting the defunct product line)

Any suggestions?

Thanks, Julian