Hey Mike,
I'm certain those parts are out there somewhere, I'm not seeing any commercial vendors that carry them though. You could probably find them at a show or swap meet specializing in antique tractors. Another route to take is put an ad in our classifieds, this is free to all members! If you are not a member we can fix that problem, you can become one of 'The Finest in Farm Machinery Collectors' simply be clicking on the membership button on this website. Then fill our the application, send it in. I think if I wanted those parts I would try a 'wanted' classified.
Take care!!
Andy