When you say the update fails do you mean the download from the website or the update in your car?
Here is the update in my dropboxhttps://www.dropbox....udio_update.zip
Extract the contents of that zip to the root of a USB stick and then follow the rest of the update options.
The most recent update is from Nov 2012.
I tried to update mine and thought it was failing, however it turned out I already had the latest update installed and the message advising this only flashed up for a second then disappeared, took 3 tries before I actually saw it
Sent from my Zetec S using the FOC for Android app