DIY floor pans.

Save your money and buy the one piece front pan. From the looks of it you will probably need the rear one too, thats pretty bad. How is the rest of the car? I would be looking at the frame rails, especially at low spots under that floor.
The rest of of the car is soild the passenger side floor seems to have all the rust the drivers side looks good. I replaced the front passenger side floor pan years ago back when I was driving it I'm assuming the rear was like that then and I never noticed it. I wish I could afford to buy the whole thing and replace it all.