I hope they do release the source code under a permissive license... If not, this is a classic example of something valuable that will be completely lost to time. A nice sandcastle built below the high tide mark, if you will.
Maybe source code open-sourcing... could be crowdsourced lol.
Thanks for working on this.
If you consider open-sourcing this it might be a project that gets support as there's nothing in the Google suite or others that comes close to this.