I had the same file somewhere but haven't been able to find it anywhere...
On Mon, 10 Apr 2000, Pat Barron wrote:
  When I was at CMU, the optical mouse pads for the
Sun-2's and Sun-3's in
 the public computing clusters were always going missing.  So someone came
 up with a PostScript file you could print that would make you a mousepad
 on the LaserWriter.
 They worked OK, though they did tend to get the mice fouled up with toner
 and paper dust.  Wish I still had a copy of the file; I just looked in the
 CMU Computer Club's file archive (where I believe I'd gotten it
 originally, about 12 years ago...), but it seems to be gone from there...
 --Pat.