This looks to be the most recently-forked version on github:
https://github.com/andyfangdz/dropbox.py
A better alternative, though: does anyone on this board have a working copy of this image still running? (If you do, don't re-pull it! It'll break.). If you do, can you extract this script for us?
command docker exec -i Dropbox sh -c 'cp /usr/local/bin/dropbox.py /dropbox/Dropbox'
will get it into your
/mnt/user/Dropbox
-- then do you mind posting to the board?
Thanks!