Open /usr/bin/get-xlite in a text editor. Do a google search for URL of a valid download server for X-Lite_Install.tar.gz Replace whats in bold with the new URL
I don't think xlite is available for linux anymore. Checked on their website, they've upgraded to 4 which is not ported on linux and they have removed the download links for 3.
Thanks though. I will try to see if I can find another place where I can download 3, but didn't have much luck yesterday.