Well that should turn out intresting, My experience with Pepakura is minimal even though I've made pep files of Clone,Snow and other armor files myself for others to make. However my experience with fiberglass and molding in more than knowledgable, if you are looking for a molder this would depend whether you would like the mold to be a rubber mold or a clay mold to me the diffrences are with the clay mold you can vac form the plastic for the rifle but with vacforming something like that you will problably have a lot of bad pulls from trying that route, with the rubber mold you would be able to slush cast it in fiberglass which would be the better alternative. If you need it molded in either form I have a lot of liquid rubber and a lot of plaster and clay that I could mold this if you need be. I cannot cast it in plastic using a vac table but if you do need it slush casted in fiberglas I can do that for you with no problem. If you need pictures to show what I have done in the past let me know and I will put a couple up for my experience with the slush method.