Hi,  Nancy Fratti has slitting wheels that are about 3" in diameter and
extremely thin, in 3 different thicknesses.  Call her for more details
at 315-684-9977, fax 315-684-9976 or E-mail: musicbox@dreamscape.com

They are extremely thin and fragile -- the slightest sideward move will
shatter them.  You should shape the teeth fully before using this to
cut them.  If you need something stronger, Dremel cutting wheels work
well.

Eliyahu Shahar