"Mr. Man-wai Chang" wrote:

If you have a valid Office 2007 product key, you could download its
installer via Micro$oft's official website.

https://products.office.com/en/download-office-2007

Hmmmmmmm.... I appreciate the help, particularly because we're now trying
to summarize for future tribal knowledge lookups, but if it was really that
simple, why did Microsoft Technical support, themselves, use this URL below
to install Microsoft Office 2007 Pro for me over the telephone?
http://msft-dnl.digitalrivercontent..../X12-30283.exe

Nonetheless, for the tribal knowledge, I just tried that URL:
https://products.office.com/en/download-office-2007

Which says "Office 2007 is now retired".
http://wetakepic.com/images/2018/02/...007retired.jpg

They have a "find more information" button here.
https://techcommunity.microsoft.com/...ficeRetirement

Which starts off with "Farewell, Office 2007", saying "It's been a great
run, but it's time to move on...".
http://wetakepic.com/images/2018/02/...07retired2.jpg