there is a petition of possible interest.

[Linux for blind general discussion]

  Wanted to share the details before posting any links.
  The goal is to ask for  eloquence to be  made an open source tts engine. 
Given how popular the voice is for many, this would perhaps allow Linux to
   address  some aspects of the speech quality problem some find with  some
  distributions.
  One can search for the petition, its at change.org, or I can provide a link,
  which does not really work in strict  low graphics.
  Best,
  Karen