Dream amulet.

I have moved a lot and my once great library has had some books check in and out over the years. However, I remember having one that gave instructions for the creating and consecration of an amulet (a coin, if I remember correctly) that if placed under a pillow, would keep away chronic nightmares. I think it was one of the books written by the Frosts but again, I'm not sure. Does anyone know of this or at least another method of making a dreamcatching amulet recommendation? I have a friend I would like to give one to.