The vSphere Client 6.0 package on Chocolatey is still a popular automated way to install the client on Windows.
The downloaded file is typically named: VMware-viclient-all-6.0.0-3016447.exe (Note: The build number at the end may vary depending on the specific patch version). vsphere client 6.0 download link
The Hunt for vSphere Client 6.0: Where are the Download Links? The vSphere Client 6