And, if you need a metal brake to bend sheet metal, go here:
http://amos.catalogcity.com/cc.class...141184360-8821
I just ordered the 18-inch version for $23 (not including shipping). They also have a 30-inch brake for $65.
Or do a google search for
"MB-18" + "metal brake"
Why am I providing this info? Because I'm building a cold-air duct for my YY cube, and I figured someone else may running down the same road I am - where to get sheet metal, and how to bend it.