If your looking for a donor car, you can try searching around Coparts for certain models if you are near one. Good way of looking for an entire car especially if looking for just parts. Just remember you need to bid and find a way to haul it if you do win (or negotiate with the insurance company).
Hey Dillon, I have a 78 parts car, not 100% sure if they are compatible or not. I know the passenger rail is toast, in the morning will check the drivers side. If it is, once I get to the point in stripping the car, you can slice up what you need.
I would remove the rest of the material around the area to see how far back the rust goes then judge if patching would work before buying an entire new floor panel.