Have you looked at LOTS Femslash (http://community.livejournal.com/lots_femslash/) or Seriousfic's commentfic prompt? (http://seriousfic.livejournal.com/383597.html) I found a handful of Cara and Dahlia fics that were pretty decent. Janine just posted one for Cara/Dahlia in the AU'verse where Cara is a schoolteacher that's great. The best fanfic I found was Within My Heart There Is Another Heart (http://scurvyknavery.livejournal.com/41808.html) which makes me really love fpreg which I usually have some level of disdain for. It's Cara/Kahlan, if you haven't read it.

I'll probably wait to post it just in case we get some miracle and Dahlia comes back to life in the season/series finale. Although, I might just end it with her death or when Cara is kicked out of the Mord'Sith. Not sure yet.