Here is an alternate plan perhaps........
If you have a Live account you can integrate your account onto your new HD. I went into my settings and went to the Live downloads section and re-downloaded from my 60g to my 120g when I got my Elite. All my prior purchased games, videos, ect. You can even go to the systems settings and set your 360 to have the downloads continue even when your 360 is off, so you dont have to leave it on if you have like 60g worth of stuff or want to do other things. It only uses a little bit of power and automatically stops when all downloads are complete.
I also have a memory card for easy transfer of saves and live accounts when I go to a buddies to play split-screen titles. If you have a friend with a memory card, barrow it, copy your saves, and transfer them onto your new HD.
If that does not work, simply try craiglist, or see if someone as cool as coolbeans above would be willing to mail you his/hers for use.