Not really a tutorial, but there's a lot of good info on the costume in this thread on tfn.
The Jedi Academy tutorial is pretty good, but I really don't recommend using the jumpsuit pattern that they suggest. It's kind of a pain to make, and this one looks easier to sew, and is more readily available.
But then, the actual costume wasn't really a jumpsuit anyway, so I guess it doesn't matter that much in the end . . . .