Where can I get cheap but good quality wiring and a box for an amp/sub?

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I have basically been given a 1000 watt, dual coil sub, and 1000 watt amp, so I am going to install it in my car. The only thing I really need is the power/trigger/grounding cables, the RCA cables, and a correct size 10" box. I think, since I do plan on a better system in the future, and I will have to half disassemble the interior anyways, that I don't want to skimp on the wiring. I don't want to get ripped off either.

What my ultimate question is:
Where can I get some good quality wiring and a box cheaply? I know bulk spools of wire are cheaper by the foot, but I don't need 200 feet of wire, when I only want to do my own car. Any body have any ideas?