If you are handy with a wrench, then replacing rusty body parts on a Scout is a simple bolt-on affair. If you already have the replacement parts, then great. If not, I'm sure that you can get what you need shipped to you from IH Parts America. If you are looking for someone to do the whole job for you, I would take it to IH Parts America in Grass Valley. They live and breath Internationals. They know what they are doing.
Best of luck to you with your project. I hope to see you down the road someday.
Marty