If your system is telling you it will take 9 hours to download just 142MB then you have some very serious issues I'm afraid to say. Are you still using a modem?
There are no other means by which I can get the update to you. A number of users are unable to utilise the 'Check for Updates' feature and have to use the cumulative updates package. However, having said that, speed wise it would make no difference because it's exactly the same package that gets downloaded no matter which method you use.
I live in a very rural location and my internet speed is not that fast at all and I can still download the cumulative updates in less than 1 minute.
Sorry I can't help with this issue