I would have to trace them with a sharp tip pen and then find a good movie, reading glasses and a small very sharp scissor, then cut. Do they need to be appliqued on? You migth then do them with interfacing applique technique. No need to cut the circles sepperate then.
http://webcache.googleusercontent.com/search?q=cache:YAr6q5kqPr8J:underconstructionblog.typepad.com/under_construction/2007/09/tutorial-interf.html+interfacing+applique&cd=2&hl=en&ct=clnk&gl=us&source=www.google.com