I found two genuine Agnus Dei's from Pope Pius XII, that are encased in a small cloth heart with intricate gold designs and hand painted images. It was in the priest's Library at the SSPX Saint Ignatius Retreat House buried at the back of a bookshelf and Fr. Zendejas let me and another boy have them. I keep it on my desk, as it is too precious and rare to wear as a sacramental.
EDIT: They belonged to a very old priest who recieved them himself from the Archbishop of Boston, I believe, and when he died all of his possessions were given to the Society. I do not know his name, but Father told me that much.
EDIT TWO: Whoops! I didn't realize I was in the Adult's Section. Sorry!