It may be easier to connect the PI to the internet for a few minutes and execute the following command but I assume there is a reason you have opted not to go that route.
apt-get install vnc-server
The VNC-Server software for Raspbian is located here. But note, it also depends on the following:
Depends: libc6 (>= 2.13-28), libjpeg8 (>= 8c), libx11-6,
libxext6, zlib1g (>= 1:1.1.4), perl, x11-common |
xserver-common, x11-utils, xauth
Recommends: xfonts-base, x11-xserver-utils
You will have to grab those packages as well in order for it to install without any dependency issues. Consider connecting your PI directly and downloading via apt-get.
I found this information from the Packages file on the website for Raspbian.