just incase you need a stylus and dont care if it fits in the holder. OR dont want to get RIPPED off by sony.
here is a 8 pack for 1.77 shipped
http://www.dealextreme.com/details.dx/sku.21878
or 3 multicolor pens also with a stylus tip
http://www.dealextreme.com/details.dx/sku.6253
here is one with a flash light
http://www.dealextreme.com/details.dx/sku.14233
and this is the one i have, with a flashlight, laser pointer, pen, and stylus
http://www.dealextreme.com/details.dx/sku.849