I make them from my rejects! Though, I am casting foam. When I have a body that does not fill or has a void in the breast, I cut it off at an angle. Bore a hole deep and glue in a pvc pipe. Then restle coat and paint it up. I made feet from the neoprene of waders, painted orange (mallard) and screwed and glued them on the bottom to flop around when the decoy bobs. Took a little playing with strap weights to get the balance right. I have a pintail body that will be done next as it was first fill try of a new body mold.