They are so easy to make and cheap. At Walmart I buy a binder of kid's construction paper for $3.00 I just don't use the black and white one's that come with it. $6 for 200 meters of clear tape and a can of flat black paint and white paint for the aiming point. Just make any size hole in a piece of cardboard for the white paint. They work as good as any store bought. And gives me something to do during winter. I could probably sell these if I was so inclined. Hmm