If you haven't looked down it yet, try the Ep. Foundation of America site
http://efa.org  .  I think under the search box, you can just type in what
you're looking for the click on 'go' or 'search' (that's beside the box) --  
try absence by itself and see what comes up.   You could also look at what
it brings in for Petit Mal or Simple Partial  (I used to have absences as
part of the latter of the 2, but the Petit Mal might include the symptom
too).
  If you've got some of the older posters bookmarked, have a look at
Julie's Idaho website or Howdy Dave's site too, to see what they have.   If
you don't have those sites (they haven't posted for 4-5 weeks),  email me
and give me your 'valid email'  address to use, and I'll look up a post I
used to put here that lists about 5 websites, then I can hook onto it and
Forward it Inline to you direct.
   I might have even Forwarded the site to you already !!  I've sent it to
about 4-5 people over last 5 weeks or so.    G./