I found it! The binder full of women from which Mitt selected his cabinet! The full quote:
"We took a concerted effort to go out and find women who had backgrounds that could be qualified to become members of our cabinet. I went to a number of women’s groups and said, ‘Can you help us find folks,’ and they brought us whole binders full of women."
So basically, Mitt Romney or his staff knew of no qualified women and had to try to find them through other means. Not helpful to your image, Mitt, that you needed help to go outside the boy’s club.