Ask HN: How can I download the Big Sur disk image?

I live somewhere with a very unreliable internet connection. I can not get the entire update for Big Sur downloaded before it fails. If I could use a resumable download manager which I often do, I could get it finished.

Is there a way to get a direct link to the image/file so I can download it myself, outside the update manager? I am a mac developer as well but there are no links in the developer download section like there used to be ages ago.