Alternate source for optical mouse pads?

[-David C. Kovar]

Someone stole one of the optical mouse pads for a Sun 386i. Sun wants to
sell us a whole new mouse and pad for $100 when we really only need the
pad. Can anyone point me to another source for one of these pads? The
grain on the pad is much finer than any of the other pads floating around
here.  The part number on the back of the pad is NCL400306-003D. Thanks,
in advance.

-David Kovar