Just as well I kept my apt-cacher-ng archive!

Unfortunately the mirror.tokra.lv redirects to mirror.its.uidaho.edu

While the mirrors are down (hopefully not too long) it is still possible 
to install Squeeze/TDE using a live-cd

http://exe-linux.fastfishwebsolutions.com/trinity/

This is not an "officially supported" method (but it works)

David