How or where can i get more voices for microsoft narrator?

i only have microsoft sam but i dont have anymore voices how can i get more voices?
How or where can i get more voices for microsoft narrator?
It would seem that microsoft gives you a bare minimum of free voices and then there's a couple or so more you can find. After tbhat you have to pay.


There is a free section on these webpages where you can download all the available free ones..


http://www.bytecool.com/voices.htm


http://www.nextup.com/TextAloud/SpeechEn...





Check these sites too for more options for pay ones:


http://www.nextup.com/attnv.html


http://www.cepstral.com/


http://www.acapela-group.com/download-in...