You have to be part of a secret fraternity in order to get them. Their source is but a secret. It is said that they came from an Alien Spacecraft during the turn of the 20th century. These aliens spread those badges is if your ancestors where abducted by those aliens and imprinted with the secret mark. This mark is passed down from generation and you have to show this mark in order to get a badge. As for the location of this mark on ones body, well…that is a secret too.
All I know is that I have one on my car and if I lead you to the source my first born will be sacrificed.