Well, as I distract myself from thinking about surgery tomorrow, these bookmarks have come to be.
There is a pattern for the Hogwarts School of Witchcraft and Wizardry, and also a design for the American Wizard School, Ilvermorny. You can make these in the house colours mentioned.
Presently the patterns are over here on Instructables. When the contest ends, I shall post the patterns directly in this post. Enjoy. And please vote for them.