I finally got the set of rough bucks made up for the quarter window scoops. I've used 5 layers of .5" MDF glued together. Once they set I'll carve it all down and smooth it out. They'll become the forms I use to vacuum mold the scoops. This set is for scoops in new quarter pop-outs, so if anyone wants a set for early standard windows I think they will need to be larger than this, but I don't have standard windows to compare to.
Jason