You can get it from
fileplanet.
I know it's a pain signing up, but if you go for the basic membership it is free. Make sure you untick all the boxes at the bottom that will send gaming info to your email. I use an email address that I don't check often, just in case they want to send me a bunch of... stuff, but they haven't.
If you don't want to get it through fileplanet, you can get it through
download.com, as I did. It calls ToTL a "patch", but it is the full expansion and not a mere patch. No signing up required.