Fiberglass would be good seeing as it's light and you can contour the shape for laminar flow. Also if make a mold and it turns out good you could make more and sell them to people....or sell the mold to a fabricator so they could make more.
======================================================== "I have no experience with this specific pump so don't continue reading expecting to find you answers." - ZLover4Life 07:14 3/16/04