Sorry about that but I sort of thought this site might be a little dated and non-responsive.
I originally got my Sportsman in about 1953 and still love it. It is actually in pretty good shape, since I have garaged it all along and not allowed much rust.
I saw a seat on Ebay for a couple hundred dollars and thought it was a bit much. I may just try to locate the supplies and directions to rebuild it myself.
Do you have one?