Auto body repair & detailing: 87 accord, floor pan, rear axle

Question
87 accord  The frame in the rear where the trunk starts above the rear axle (if it had one that is) is rusted BAD! Is there any way of fixing this problem at minimum cost?  Do they sell just that peice of frame some where? If so how easy is it to do?

Answer
Tim-

Major safety issue and major cost to repair. Turn and run from this car if you are considering a purchase, also turn and run from this car if you already own it!!! An entire replacement of the floor pan is probably needed and not cost efficient for this year of Accord. Mark