I lucked out and found a ton at the dollar spot at Target when all the back to school was starting. (it was $1 for three).
I was going to recommend Vera Bradley, but they are pretty pricy.
Also, the office stores like Office Max and Staples have suprised me in terms of "pretty" but not sure what price point is "decent" If I wanted pretty, I'd pay up to $1 a folder, but if price were an issue, I'd buy sturdy, but cheap ones and call all my friends who scrapbook and have them cut (cricut or sillhouette) shapes and let the gals decorate their own as a take and make.
Good luck!