We offer the Windows Expert bundle on our website on https://www.torproject.org/download/tor/ (after legacy/trac#29991 got fixed). However, 1) The version offered is horribly out-of-date and probably contains security vulnerabilities 2) It's _not_ source code. Those are binaries being meant to run on Windows. Thus, this is confusing as the links otherwise point to the actual source code (and signatures) 3) Additionally, I think per-platform source code is confusing. There is no source code just for Linux or just for macOS (nor Windows). I am not sure if you want different tickets for the issues raised here, though. whatever works for you best I guess. 1) is the most pressing issue.