The AD style covered a lot of years so there are quite a few of them out there and parts are available.
Its overpriced. I suggest finding one with decent metal because in the long run the better the metal the less you spend in the end.
Be patient and like dubds10 says. Look at craiglist. Buy with your pocketbook and not your heart. Those trucks like the one you show go for around $250 here and then most folks make rat rods out of them.