there was a previous thread on this http://cakecentral.com/cake-decorating-ftopicp-6045779-.html
For my ophthalmologist's cake in my photos, I just drew a series of treble clefs and notes on lined paper and placed it under a sheet of waxed paper. I piped over the lines with royal and when dry, removed them and applied with another dot of royal. Hope this helps.
Those music notes look like they are made from royal icing. I cut mine by hand. I looked for small cut-outs and couldn't find them.
i did the ones on this cake out of royal icing.
If you're looking for a template to cut out fondant or gumpaste I would find the note in an image search on google. Save the photo and then paste it in a word document. Once in the word document you can adjust the size to be whatever you want.