UbuntuStudio repository question

[thomas fisher]

My repository list on /etc/apt/sources.list  was ok. 
NOW
Synaptic complains  : Could not resolve 'archive._____  
http://archive.ubuntustudio.org/ubuntustudio/dists/feisty/Release.gpg
http://archive.ubuntustudio.org/ubuntustudio/dists/feisty/main/i18n/Translation-en_US.bz2
http://archive.ubuntustudio.org/ubuntustudio/dists/feisty/main/binary-i386/Packages.gz

A check with a browser indicates the URL does not exist.

Could someone tell me what these URLs should be?
Thanks
Tom