In January 1966, Jörgfrieder Kuhnle founded the company Fiberfab Karosserie in Ditzingen near Heilbronn, which existed there until 1972. He started with the production of the Aztec GT kit car developed by the American company Fiberfab. This model was built for about two years. Based on the US model, other Fiberfab models were constructed in Ditzingen, such as the Bonanza GT, another version of the Aztec, and the Bonito, a two-door 2+2 coupée that was produced until 1979. All vehicles were based on the VW Beetle platform and had a GRP body. In 1975, around 50 bodies were made for the Swiss Sbarro BMW 328 replica, Kuhnle also produced a polyester-bodied car based on the Citroën Dyane with a 435 cc two-cylinder or 502 cc engine as an alternative to the Citroën Mehari. This car was called Sherpa. From 1986 onwards, Fiberfab Karosserie J. Kuhnle was only active as a supplier of plastic parts to tuners and automobile manufacturers.