found this by accident.
It is advertised as a Porsche RS60 copy that you can commission the builder to finish to your spec. It is advertised as 'Aluminum bodied RĂNGE Coachbuilt Porsche Spyder RSK Durlite RS60' and the builder is one Chris Runge of Minnesota. It is Porsche 912 powered and the particular car in the photo is known as the Frankfurt Flyer.