That looks so cool. I'd love to try it myself someday. I have earlier versions of my Jedi costumes and this would a perfect use for them. Have you tried dying the tunic yet? For the boots, I would consider making boot spats out of the organza and just covering them. Is there any stretch to the organza? That could make it fit better, but if they were a little loose on the leg then the organza could look nice a little crinkly and loose. If the spats fit well on the foot then they should stay put, just match the seams in the organza with seams on the boots. I'd do the same thing with the belt and pouches.