Offline installation of Docker on Ubuntu


First off, my apologies if I posted this in the wrong forum.
I am trying to install docker on an Ubuntu server but due to security issues the user has had in the past, they are refusing to have the server connected in any way to the internet.
My only option it would seem is to try and download all of the files and attempt an offline installation.
My question is whether or not these files are available somewhere and if so how I would go about the installation.
I am new to this situation and any help would be greatly appreciated.