There are a variety of styluses available (you need one which is for capacitive screens); beware of very cheap ones as, although they do work, they do not run smoothly over the screen. We have tried a variety and we have found the following two to be very good (at either end of the price spectrum):
Bamboo Stylus the best we've used, but also the most expensive!
A quick google search will probably turn up your specific needs; here are a few links which may help you:
Music paper , Music paper