I did a deeper analize of the ESB and PP3 armor and I noticed that these two armors (obviously the helmets too) are not the same, but are close enough to confuse an outsider. I'm aware that I did this statement (the ESB/PP3 armors being the same) with ease and I made a big mistake. I'm sorry for the confusion I spread and I already changed the thread title that said ESB/PP3. I will make the necessary changes with the stencils too.
You can use these stencils for the PP3 armor if you don't want a super-accurate one (the scratches on both armors vary slightly in form and the placements are the same). The major change is the Bantha Skull which is the ROTJ type and not the ESB one.
Thanks for your understanding!