The hood was actually super easy to make. Like Neko said, you just trace them. It took us around five minutes. And yes, patterns are usually too big for me, too. But I definitely prefer them at the moment, so I know I have at least something to work off of. Plus, it's totally worth it if it's too big, because that mean it's not too small. XD
Sculpy and Fimo are pretty much the same. My girlfriend used both Sculpy and Fimo to make her beads, and they look exactly the same. You just have to put them in the oven seperately. But yes, Sculpy should work.