(you can get a Sharpie and write Monster on the cable if you feel like it) Lamp cord is all I have used for years look at your local home improvement center...One of the dirtiest secrets in HT is that you can use lamp wire and it is indistinguasable from "oxygen free" expexsive speaker wire.
Lamp cord is available in various sizes, of course. The bigger the better.Yup, lamp cord should work just fine...