This was brought up a while ago that the Apache 2.4.x and 2.2.23 builds were lacking the win32 source bundle.  There was some discussion about how to build these bundles:

Is there anyway to make available the details of how these windows src bundles are built for those of us that need to build our own?  I imagine if I knew Windows better it may be more obvious but I'm really not a Windows developer and tend to just follow recipes when trying to make dev stuff work on Windows.