I've spent the day collecting patch mirrors for everyone. Some may require a short free registration. All of them are sources I, and others, use and trust. However with that said, we can't be responsible if something goes wrong. But I've never heard of that happening.
2.3.3 to 2.4.0 patch mirrors:
WoWWiki and Nihilum. However, there are several sites on there that I haven't been able to test or havne't used before - so your mileage may vary.
Enjoy your speedy downloads!