You could make one using some wire or a wire coat hanger. Then you would have no air drag at all. You could use stainless steel wire...Or cheaper and easier to work with would be anodized aluminum wire. Most good plant nurseries will stock aluminum wire because it is used for growing bonsai.
Yes, aluminium would be the way to go. They make quick thick wire for large bonsai trees and it wont rust and its light weight.
itsaboat mate...Life is just a boat and then ya marry one !