You can get the Cratos-Lion XFCE theme here:
http://xfce-look.org/content/show.php/Cratos-lion?content=151866
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You can get the Mint-X XFCE Theme here:
http://xfce-look.org/content/show.php?content=134015&PHPSESSID=9fd17e1a1b702f33737cf6f3603e0d5d
You can get the Radiance XFCE Theme here:
http://www.ravefinity.com/p/download-ambiance-radiance-themes-for.html
You can find more XFCE Themes at DeviantArt's extensive website here:
http://browse.deviantart.com/customization/skins/linuxutil/desktopenv/xfce/