Threesome?

My husband and I have recently decided to fulfill our threesome(wwm) fantasy before I give birth (9wks4days preggo) because it will be a one time thing, just to get it out of our systems and once our baby is born, we will only focus on our child. Anyways my question is how do we find a willing female to join us?? Since we prefer a stranger rather than someone we know to avoid probs or awkward situations lol please help and thanks 😊