I've actually been going through the forum for the last few weeks searching for any and all PP1 threads and information myself. I'm slowly working up to doing a PP1 ears helmet, but also really enjoying learning even more about the evolution of the six suits as a whole. Something I enjoy specifically about the PP1 is the debate on the colors for the helmet. Was it indeed painted with the same green as the other Johnston helmets and looks bluish due to old photographs, or was it actually painted bluish (like the Kenner figure and cartoon based on it) before they decided to go green with the others?
But some other threads I've come across that may help:
The Boba Fett Suit Fact Files
Boba Fett Pre-Pro #1 (PP1) Helmet Stencils
and some paintups:
Superjedi's Pre-Pro 1 "Eyes" helmet
LAYERED PREPRO 1 HELMET - EARS VERSION
Superjedi's PP1 Eyes for Tennantlim
But not only is a really cool helmet, and unique among the original six, but the mystery of that suit is a huge appeal as well. Limited pictures and information but it's always exciting when someone on here learns something new or uncovers unknown info.