This tool seems great to achieve this issue : how to apt-get without internet (with all dependencies problems of course) ?

http://aptoncd.sourceforge.net/

Have you ever felt that there is no life without APT? Well, if you’d suddenly lost conection to the internet, how would you install new packages? What about dependencies? You’ve just finished installing Ubuntu and configured it to a rad look, with all your favorite applications? For some reason you now have to re-install it? Feel like you have to download all of your favorite programs again?