Total Restoration Needed

I am at the beginning stages of breathing new life into a 1968 Dodge Dart GTS with the 383 and a 4-Speed. Will probably never recover my costs but I don't want to see the car parted out. It has its all original drivetrain. However, the car needs about everything. Where is the best place to buy parts? Also, is there a place out there where you can buy packages? For example the entire interior package. Or all glass packages?
Thanks,
Al in Maine