Any Old Car

Hi, I am looking for a old station wagon, sedan or something that is not salvageable.
Preferred location is around Dallas- Fort Worth area to south of Oklahoma city or anywhere close.
I am looking to build a seat out of the car, I would prefer a station wagon, but I know "beggars cant be choosers". I am looking for something free-$500, I am in school and cant afford a whole lot right now. I would like to be able to bulid one from the front and rear, I'll keep one and the other I will sell.