"Software Unavailable" for Windows Support Download in Bootcamp

Whenever I try and download the support software for Bootcamp 3.04, I get the message "This software is unavailable". Where else can I get the Windows 7 support software? I have an late 2010/early 2011 15" MacBook Pro. Thanks!

I'm assuming that this is the software that will fix some of the glitches with my Win7 install (no wireless, goofy trackpad, improper keyboard mapping, etc.).