Hi Bob I have a 1938 series 1 not a drophead and with a climax engine ,but i presume that the suspension springs were the same. I have some spare ones i can measure but they are buried under stuff ill try and get at them tomorrow,as for a supplier of new springs ,Martin Wyatt midland secretary,may know as he has a series 1 and worked for a spring manufacturer,details are in miscellany,will get back to you duncan