I would like to get back into WoW after a 1 year break, but I am not the admin on my laptop so I can't install the game.

I do, however, have an external hard drive on which I wish to play it.

I have downloaded the installer for WOTLK, but as I am not the admin I can't use it, so I'm looking for somewhere that I can download a .rar or .zip of the files already installed that I can download to my external hard drive.

TL;DR - where can I download a .rar or .zip of the WOTLK files (not the installer)