Snow sabre icons (Folders) was originally a Mac theme created byfor his personal use on Mac. Here are the themes (black & light) for Ubuntu Gnome 2.x by Naf71 which has gotten permission from miniMac.
Just download and extract the tar.bz2 from the package, right click on your desktop and then choose “Change Desktop Background” from the up Menu then go to “Themes” tab and just drag and drop one into this window. This will install the icons and then it can be found under Customize… -> Icons
Check on gnome-look.org (download link included): http://gnome-look.org/content/show.php/Ubuntu+Snow+Sabre?content=124378
Alternative download link: http://www.deviantart.com/download/192507414/snow_sabre_by_naf1971-d36m3o6.zip