HERE ARE A COUPLE
http://old.burdastyle.com/howtos/show/1692
http://www.stamps-and-stitches.com/2...-tutorial.html
a friend made me one, using the little silicone cupcake holders. (Basically, it''s like the pincushion in a teacup pattern, with a little button on top for a cherry and felt icing.
One more site with oodles of pincushion patterns:
http://tipnut.com/22-free-pincushion-patterns/