You can sways try to get them from Al Rabe (me) at alsf8f@yahoo.com. If you like the airplanes, I also have a few extra copies of the Feb 1973 American Aircraft Modeler, $5 including postage. Magazines are new and include a lengthy article and plans for Mustunts I, II, III. I also have the original ink drawings which can be copied. I don't recommend the Mustunt III. Its only change was the tapered wing which shortened the nose too much.Thirty years later I corrected that problem with the Mustunt IV. I put the wing on the bottom of the fuselage with dihedral to position the leadout location. The airplane flies and maneuvers upright and inverted with the wings level. I also added shock gears and a stretched the fuselage which vastly improved the appearance of the airplane. Mustunts II, III, and IV are all the same aft of the cockpit. It is also the best flyer. Mustunt II and III plans from the magazine are $15 including postage. There is also an 11 part Mustunt IV tutorial on Stuka Stunt which runs more than 30,000 words and tons of photos. This complete article is also a part of Al's Models 4 DVD including plans to all of my airplanes.
Al