Seeing I was looking into this for an E11 here goes. If I would do one I would want to use all found parts. Not copies. So, we would need:
W&S
scope
machined barrel
fins
Bomb halfs - have that
V8 cover - have that
other plate - trying to have it made
Then about 6 gallons of stuff to make the mold at about $150 for 2 gallons
Wood to make the forums.
So, to make the mold could cost over $1,000 and not a single one has been made. Not sure on the resin yet. The stuff that I have been using is about $45 a gallon. So, is is not a cheap idea.