Of course, by
"Word 7" you mean
Word from
Office 2007, because real
"Word 7" is from
Office 95 package, which was release 17 years ago. There were no quick access toolbars in MS Office packages at the time
In Office 2007 Quick Acces Toolbar settings are stored in .qat files in
%LOCALAPPDATA%\Microsoft\Office
For Win 7 it is the same folder as
C:\Users\%username%\AppData\Local\Microsoft\Office
So you can back them up and move to a new system.
For Office 2010 and 2013 those files have .officeUI extension, because tabs are customizable too.
I have used that idea for an automatic solution in my
Quick fix for CAPITAL LETTERS in Office 2013 ribbon.
There is a self-extracting archive, which extracts those files directly to mentioned folder.