Balsa USA sells modern versions of the Swizzle Stick called "Stick 40 (3 ch.) and Stick 40 Plus (4 ch.). Their website address is:
www.balsausa.com. They also sell a wing kit for the Stick 40 Plus. I built the Swizzle Stick about 30 years ago and the Stick 40 Plus recently. They are very similar.
nanavion46