solution(s) for missing online DISM sources

IDK if anyone else here has to deal with this or has encountered the same issues in their environment but it seems to me that for the last year or so dism /online /cleanup-image /restorehealth no longer works and will always hang/error out saying it can't find a valid source. As this issue has been ongoing I'm seeing more and more machines having issues with sxs errors and application crashes related to various framework corruption issues, while I lack an easy fix short of specifying an alternate source. Of course I could build a collection of repos on an SMB share for each version/build of Windows to point DISM to, but collecting up good copies of all the different sources\sxs folder versions and scripting something to fetch the correct one for any given environment is a lot of tedious and time consuming work so I'm wondering if anyone else has already done it or found another more elegant solution so I don't have to reinvent the wheel.