Try Jimbuna's FileFront page:
http://www.filefront.com/user/JimbunaGWX2/
You want all 7 .bin files and the .exe file for GWX3. Download all to same location on your hard drive and run the .exe file. If the .exe file downloads without the .exe extension (there was a problem with FF doing this in the past) just rename it GWX3.exe and then it should open when double-clicked and the intallation will start.
I think there is an "all in one" download there as well, torrent maybe? If not there you can pop Jimbuna a PM and he can prolly help you out with getting it all in one pop.