Sportee Monno built by Silver Star Industries, raced by Robert Hedrich in 1965 ?
Well found!
I began this puzzle based on the article below, believing this to be another VW-based kit car by Silver Star Industries, the company responsible for the Sportee Monno GT.
As things progressed, I learned that: 1) all of Silver Star's cars were branded Sportee; 2) this was the first Sportee to use the model name Monno; 3) this was a one-off prototype (built by Silver Star on a tubular frame) that was never offered for sale as a kit; and 4) it was raced in 1965 by the owners of Silver Star (brothers Tom, Robert, and John Hedrich).