Visual Studio 2019 Preview Remote Debugger
Visual Studio 2019 finally got an Installer Package on the Download-Site of Visual Studio: Visual Studio Remote Tools
This package should be preferred if you need the Windows Service for Debugging another machine.
I found it. They haven't published a package for the current preview but the debugger is included in the standard install at:
C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview\Common7\IDE\Remote Debugger\x64\msvsmon.exe