I have a 1930 Model A and when I was ready to install a seat I took measurements out of the cab and went to the junk yard. You don't want the back to come up too high for a one piece seat or you can't see out the back window. Turned out an old jeep seat fit just right but I can remember seeing a seat in a shool bus that would work also. If this doesn't work for you visit some of your local automotive upholstery shops, with your measurements in hand. Sometimes they will have something laying around the shop that will fit.