Welcome to the wonderful (NOT) world of parts hunting for Speedex! As you are finding, the few who say they have parts are hard to get ahold of. Did you go to www.speedextractorinformation.org
? ORG, not COM. Hard to navigate, but look around some. Many forums are weak and little traffic. There is one on Yahoo groups too, but slow. Most of supporters are in Eastern OH, or Western PA as they were made in areas there. Just have to get on all of the forums and put questios out there. This might be a situation where you will have to wait for summer swap meets and maybe even buy another whole beater tractor to get the parts you need. The S series are alike for many years with improvements as you move up in years and model sizes. Sorry I can't help more. There was a few Speedex fellas on here I thought, suprised not more responding. I had a late model and much I had to just figure out myself, not much info. I have sold since, but keep thinking I want to try anothr later model........but so far have kept myself talked out of it, Ha!