Try torrents?
Just the 64bit: Microsoft Office 2010 ProfessionalPlus 64Bit (Full & Lifetime Activation) {sMileyBoY07} {H33T} Torrent - btjunkie
Both (but double the download size): Office 2010 (New) Professional Plus 32bit and 64bit with Volume Edition Activator_timesurfer Torrent - btjunkie