I was given an amp for free today, but it requires a special plug. I have searched ALL over the web to find an adapter or the plug with no luck. Does anybody know where I would be able to find one? It is a Lightning Audio Strike s2.300.2 amp. The part I need is what is shown in this picture.

http://bilder.hifi-forum.de/medium/227602/img0579_128911.jpg