I don't know anything about finding free pepakura armor plans. I have seen free leg pepakura armor plans. I downloaded it. I am no professional with pepakura or with clone armor. Do you plan to do 501st with this? Or just a good costume for trooping? If your looking for good quality I do know Skupillson (sorry I spelled that wrong i believe) makes some great pepakura costume files. He sells all his files for $7, unless your getting a bundle. I'll stop there because thats all I know. It may not be free pepakura but its great quality.
Sorry for the double post, I had to go back and find the link.
Ok here is the link that I got the leg armor from. I wanted to use the leg armor for my mando. http://forum.clonetroopers.net/index.php?showtopic=10946&hl=pepakura
Hey, wait a second. Are you the smae archangel on the clonetrooper boards? You seem to have atracted quiet a crowd over there. Best of Luck!