HLK 1607 install fail

I'm looking for Hardware Lab Kit version 1607 (required to test hardware on Server 2016) but it's not in VS Downloads (10 other HLKs are there) and the public download installer fails due to corrupt content.

https://docs.microsoft.com/en-us/windows-hardware/test/hlk/

HLKSetup runs, the config steps work, install begins and then fails ...

"Install did not complete successfully. Unable to verify the integrity of downloaded content. It might be corrupted. Please check your network connection and try again"

Tried multiple times and on two systems, same results.

I've attached a screenshot and log (sorry, it's a pdf, this site won't accept .log)