I am a high school science teacher and was interested in having students make some penny whistles. I know I could have the students make the fipple, but I also realize that this may be the most difficult part. I would like to focus more on the theory and mathematics, as well as the music making 
Can anybody recommend an online suplpier of premade (plastic) fipples that my students could glue to the whistle body tube?
I would order a bag of a hundred or so if I could.
Thanks, Suul