What do you mean by ESB based? What shape that would be? I ask this because all the helmets were cast from the same mold (from what we know) and the slight differences were made by the amount of extra material trimmed at the base of the helmet, the way they assembled each helmet and the way they were handled during promotional tours, filming, recasting and archiving.
The short answer is, you can use the pepakura file for all helmets, but for ROTJ (in this particular case) you'll have to remove the viewfinder (on the rangefinder) and add the 2 dental files in the rear keyhole.
