We have here unofficial stable and unstable apt-repositories containing the following exciting developments:
The line for your /etc/apt/sources.list is:
deb http://www.wilmascope.org/debian potato/
But since you'll also need Java3D, you may want to add
deb http://mirror.aarnet.edu.au/pub/java-linux/debian potato non-free
or an apt line from one of the numerous other mirrors.