I'm a little old school since I don't have a printer that can do 6 foot sheets nor the money to have forms cut by laser. I just get a big A piece of paper, like for a banner or something, fold it exactly in half, then draw half the profile, cut it out and unfold. Then I have one whole profile that I can trace onto a board. It's not quite as fancy as using computers and lasers and whatnot, but it gets the job done.