Alternative way to install macOS Catalina as a software update ?

Hi everyone,

Due to my slow and instable internet connection, when i launch the update process from Settings -> Software update on macOS Mojave it constantly fails when there is an internet connection interruption, and it does not resume the previously downloaded update, it always restarts from the beginning and that's not convinrent for me with a 8Gb update.

I used to download the installer from the downloads section for apple developers https://developer.apple.com/download/more/ , using a download manager so i can resume the download once it stops, but macOS Catalina is not available anymore on this page.

There are some updates available here https://developer.apple.com/download/release/ for macOS Catalina, but they are just updates (3 Gb usually) and not the full OS installer which is about (8 Gb) when trying to download it from the software update section.

Is there any way i can download macOS with an external link outside the software update tools available ?

Thanks.