I found Orgran's chocolate mousse mix is made from dexrose, without cane sugar. It's super easy to make. Also it's also gluten and dairy free. I get it in the "health food aisle" at Ritchies or Coles.
It tastes chocolatey enough to squash my need for chocolate. That's why I got it- I was trying to talk myself out of buying dark chocolate to make another chocolate mousse I found in a recipe book because i read how much sugar was still in dark chocolate. Probably good if you only have the time or desire for a quick mix- literally add one cup of water and mix.
If you have more time, make one of the recipe page mousses with real cream, etc.