Maintaining a Win32 version should be possible, all necessary changes can be found in #2590 (and need to be reversed more or less).
I personally doubt if it is worth the efforts. This is why we switched to x86_64 (after some discussion about the switch in #2590). Providing the Windows installers is already an extra effort on creating releases and is time consuming. Then providing even multiple variants is even more work.
But yes, if there are actually more users who have to use Win32, your approach might be feasible.