The only ones that I know of that Vern designed are the Astron Scout and Big Bertha. He also made the Space Plane kit (it was based on John Schutz's first boost glider design, but Vern built a couple dozen variations of it in order to make a model that could be easily built as a kit; perhaps it gets dual credit).

G. Harry Stine designed the Astron Mark (says so right here in catalog #261).