Based on Rogers magnificent work I've put a first hack at 1.9.6 on deb.openssi.org.

For your /etc/apt/sources.list:
deb http://deb.openssi.org/openssi-v1.9.6/ ./
deb-src http://deb.openssi.org/openssi-v1.9.6/ ./
  
Don't forget to make sure you have
Package: *
Pin: origin deb.openssi.org
Pin-Priority: 1001
  
in /etc/apt/preferences

Once again - this is for Sarge, with the 2.6.11 kernel.

Enjoy, and thanks again Roger.