I used a Simplicity pattern #8311 and modified it slightly. This is a pretty dern good tutorial regarding it: http://thejediassembly.com/tutorials.php?id=s4u
it wasn't free, but it was like $4
that was for the outter tunic.
The inner tunic, I used the outter as my basis and made it by hand.
The robe I used the padawan's guide information page to study Obi-wan's TPM robe and then did my best to create it by hand. I'm not that skilled of a tailor, so if I can do that, so can anyone else really.
Does anyone have that simplicity pattern posted for use on the net? I know they made a specific jedi pattern a few years ago, but has thus been discontinued...
but that's of course if you're trying to use the link I posted above from the Jedi Assembly. To my knowledge there isn't any pattern out there you can use without any sort of modification to make your Jedi.