The tabbards are made from my own pattern, using reference from the movie costumes as a guide. The movie Jedi tabbards have a waist seam that I was not aware of until someone requested me to make a set of black pleather tabbards and he pointed it out to me. This site on the Jedi Council Forums is a great resource, particularly this image.
Since then, I make all my Jedi tabbards this way. It really helps them to lay properly with the angled pieces and the waist seam.
