Rodney,
I know you asked for online stores, so I will give you some suggestions:
1. Monoprice.com is SUPER cheap, if you need any other AV cables, I would order ALL your cables through monoprice. They are by far the cheapest source of cables in North America. You can also get banana plugs through them to go with your 14 guage (the 12 guage from monoprice.com insulation needs to be trimmed down to fit into the banana plug according to some sources).
2. Bluejeanscable.com has awsome speaker wire (very thick strands) and I would recommend them as I am using their 12 guage Belden wire and I love it.
So if you are ordering more than just speaker wire (HDMI cables, component cables, banana plugs, VHA cables, RCA cables, etc) I would do a one stop shop at monoprice.com and save probably over $100USD.
