Drive Pressure tubing?

Just wondering where you guys picked up the copper tubing? Do most hardware stores carry something like that? Can a standard boost "tap" (or what comes with a plastic kit) be used on the manifold? And lastly, what's the recommended lenght (b4 plastic)? I plan on coiling (and hopefully cooling :lol3 it "inside" the passenger fender well. I'm hoping there'll be enough air movement there, anyway.