Rick, nice find, however I do have an observation which may be totally wrong. First let me say that it is after midnite and it's been a long day. Second be advised that I have very limited knowledge of mold making and may have read your post wrong. You advise that the parts are "males" which would imply that to make a mold of same you would be glassing the outside, grey colored fiberglass. If that is the case, and these parts are dimensional accurate now as a body, won't making a mold of the parts with those flanges affixed throw off the dimensions of the body by the thickness of the flanges? To my knowledge, molds are generally female, (I know some molds can be male) bolted together and then the parts are pulled from the inside. You may have to assemble the molds, glass over the joints on the inside and then grind down the flanges. You would then be left with an accurate body in which to pull a mold. Again, just an observation and I could be totally wrong. It's just something to think about. You havent't provided any pictures of the other side of the body parts. Are they raw fiberglass or is it a smooth finish in which to pull a body? I know there are fiberglass experts on the forum who can comment better then me. Good luck in you undertaking.