By the middle of the 1930s, Duple was widely regarded as a coachbuilder, although bus bodies were still produced in quite large numbers. An order was received from Vauxhall Motors for special sports tourer bodies on Vauxhall 14 hp light six chassis and a stand was taken at the 1933 London Motor Show to display them. They were advertised by Vauxhall up to 1935 and may have been Duple's last car bodies made in quantity, although they also bodied Canadian-assembled Buick 8-50 cars for General Motors in the UK. Also built in the 1930s was a special coupé on an Alvis speed 20 model for Lloyd Thompson of the Holdsworth Moquette company, a major supplier to Duple and many other coachbuilders.