Inexpensive speaker wire in appropriate gauges(i.e. 12-18)and in various colors if transparent doesn't suit you is available from online sources such as Parts Express in addition to the usual local Home Depot, etc. A hint for Billy and others who may have difficulty in fitting a thick wire through the opening in the binding post: there's no reason that the end of the wire has to be the same size as the rest of the run. Forget about banana plugs unless you're going to be frequently connecting and disconnecting the speakers. If the end is inconveniently thick, simply trim as many strands off as necessary, for example trimming a 12ga wire down to about 16ga at the end. It's the overall resistance of the entire run of wire that counts and the thinner end doesn't significantly increase that.
