Well, first off I think you could be a little more specific about which leg pepakura pieces you're talking about. Assuming you're talking about the spartan Mk. VI armor, then use the search bar and type in something like "crackhead HD thigh" it should come up in a couple of pages. crackhead's the creator of basically all the HD files below the waist, you can also search him in the members area and look at the topics he started, should be one of those. Good luck with your build!