Here are the links for the eight audio letters.
Right click to download to hard disk. 
Internet Explorer: save target as
Firefox: save link as

http://www.batbforever.com/scripts/Vletters/LW/letter1.mp3
http://www.batbforever.com/scripts/Vletters/LW/letter2.mp3
http://www.batbforever.com/scripts/Vletters/LW/letter3.mp3
http://www.batbforever.com/scripts/Vletters/LW/letter4.mp3
http://www.batbforever.com/scripts/Vletters/LW/letter5.mp3
http://www.batbforever.com/scripts/Vletters/LW/letter6.mp3
http://www.batbforever.com/scripts/Vletters/LW/letter7.mp3
http://www.batbforever.com/scripts/Vletters/LW/letter8.mp3

Thanks to Sobi and J Ecris for making these available on batbforever