Hi and welcome to the user to user forums, so not anywhere you can order a program from.
There are no staff available for such purposes on these forums. Even if they were, it is not likely Magix would sell out of date and therefore unsupported software.
I think your only hope is if you can find a boxed version from a reputable retailer that contains a valid off line activation code, as I know of no software developer that will sell you an out of date and unsupported piece of software able to run on an operating system that is also no longer an actively supported operating system.