Floor Pan Help!

the dirty secret with the rear floor pans is that no one sells the "complete pan"

this is because the rear pan is 2 pieces from the factory and only front section is reproduced. the back part that is just under the front of the seat is typically what rots (at the seam) between the two pan sections and you need to replace both. check if you need that rear pan, and then start searching the forum for folks parting cars and willing to cut the floor out for you