As I was reading the latest issue, I came across an article titled "13 Fun, Preppy Fabrics". The article went on to say "Preppy is back. With designs ranging from argyle, seersucker, and cable knit, consider this a handbook on how to bring the happy look into your home."
My initial thought was, when did it ever go away? But I guess that's beside the point. For anyone who happens to have the April 2011 issue on-hand, you can read where to get each of the below fabrics on page 32.