150 from China! Good luck. D-cell, Epoxy resin, inserts, cloth, top and bottom sheets, labor, duty and shipping. Even if you went with regular fiberglass you are going to have to order well over 500 boards or more to maybe be able to meet that price and that will be cost.
I used to think the same thing how board prices were so outrageous, especially for a mold popout board. But for a hand made custom you should go and price out a materials list to make your own. Thats what I did and now I make my own boards. Even without calculating things like a rocker table, vacuum pump, and heaven forbid my time involved, materials will run you $250-$300.
You really want to revolutionize the business go to school as a molecular chemist and develop a new material that doesn't require painting, floats, has similiar mechanical properties as a shaped board, is non toxic, doesn't require glassing and easy to shape, oh and cheap.