I have had my Symbols since 1997 and NT 4.0 and accumulating up to Windows 10. Until the Windows Installer Service just wasn't strong enough to install all the debug symbols that you would have to retrieve it from the symbol store at Microsoft. if you have all your debug symbols you can set up a private symbol server and work with debug help to retrieve the source files from the servers using the DIA SDK and the Debug Help API. Really it is up to the partners to make a dbghelp solution if they haven't already I might have a older one in my files. If I do I'll put it on my GitHub. Corporate has a supply chain. Microsoft needs to work on their Component Source relationship. I own Sparx Systems stock from Australia. I paid for my Code Jock Suite Pro 98.
https://github.com/sharedsourceinitiative/Debugging-Code-Center-Premium
https://learn.microsoft.com/en-us/windows/win32/api/dbghelp/
https://learn.microsoft.com/en-us/windows/win32/api/dbghelp/nf-dbghelp-symgetsourcefile