Rust work can be not only expensive, but frustrating and hard work as well. You can get most of the sheet metal parts from NPD, but you will need a welder and the skills to go with it. Whether or not you tackle the rust will be up to how you feel about your skills, and the time, room and patience to tackle it. And remember that you are not working on a classic that will be worth more when you are finished.
And, welcome to the site. We have a bunch of great guys and gals here.