I am pretty certain this Office version is a trial anyway--would be looking to locate the permanent version actually when it's available.
Wzor has the leaked RTM of Office 2010 on his site.
MICROSOFT.OFFICE.2010.PROFESSIONAL.RTM-ESCROW.X86.RETAIL.ENGLISH-MSFT
BUILD: 14.0.4734.1000
FILE: 14.0.4734.1000_ProfessionalPlus_retail_ship_x86_en-us.exe
SIZE: 681,636,632 byte
SHA1: 68E35E6AB04753F8086E365CBF02EC87FC84453D
MD5: 753D83083D19A7ED5D32366BCCD2789D
CRC: 9A4A383
NOTE: need serial for installation
MICROSOFT.OFFICE.2010.PROFESSIONAL.RTM-ESCROW.X64.RETAIL.ENGLISH-MSFT
BUILD: 14.0.4734.1000
FILE: 14.0.4734.1000_ProfessionalPlus_retail_ship_x64_en-us.exe
SIZE: 751,891,192 byte
SHA1: 21625AA10F70ACB235F4FBAF41DC6C0B40D2765F
MD5: BE36BD5568CD10C8DB76A8643137E4F7
CRC: 55CF44FA
NOTE: need serial for installation
MICROSOFT.OFFICE.2010.PROFESSIONAL.RTM-ESCROW.X86.VOLUME.ENGLISH-WZT
BUILD: 14.0.4734.1000
FILE: 14.0.4734.1000_ProfessionalPlus_volume_x86_en-us.iso
SIZE: 767,623,168 byte
SHA1: 512028BD930731E7A665DC0897CDD317204F29EA
MD5: E22DDB3B98B22E475F6175BD36332E24
CRC: ED3E687C
NOTE: no need serial for installation
-=W.Z.T=-
MICROSOFT.OFFICE.2010.PROFESSIONAL.RTM-ESCROW.X64.VOLUME.ENGLISH-WZT
BUILD: 14.0.4734.1000
FILE: 14.0.4734.1000_ProfessionalPlus_volume_x64_en-us.iso
SIZE: 849,281,024 byte
SHA1: D08DFDD98805E42E052662C0EC87E6AE441194EB
MD5: 8072776E05CC57FA53D7DD591BDD0CB1
CRC: 40D8196C
NOTE: no need serial for installation
-=W.Z.T=-
http://wzor.net/page/history-20.html