How large is that file? Someone "might" be able to send it ZIPPED in an Email attachment. Different routing on the download might make it work better. Do you know how large of an attachment your Email will allow you to receive?
RE: Your download problem? Welcome to the club!! I've been having problems with my internet connection now for the better part of 2 years and it still fails regularly on even a 40mb Firefox update? And Ubuntu updates are worse than that! Complaining to my ISP (nTelos Wireless) has been an exercise in futility and has only made it worse, which makes me think they are "horking" with me!
Ennywho, won't hurt to try via an Email attachment if it's small enough and someone has it and can try to send it to you.