Where are the best yards ?

I'm from eastern PA, near Philly. I get a lot of stuff for my 70 mail order from Sundell Auto in Slippery Rock, PA near Pittsburg. I'd like to find a closer yard in eastern PA, South New Jersey, Northern Delaware or Northeastern Maryland where I can ponder the ellusive 70 malibu/chevelle beast in person. All of the Philly and local yards tell me that they've buried the bones of such extinct dinosours. Any places I can go for my hunt ?