Mike, although some apparently think that the cables that are included with some components were all manufactured by the Crappy Company, it's just nonsense, and especially for runs as short as 3' they and just about anything else that looks like a wire work very well. If you can't find it locally you'll have to try online(and get into some shipping charges). Parts Express has a nice selection from about $2 up, and in my view nothing higher than their Dayton line should be necessary.

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Enjoy the music, not the equipment.