All the High Seirra Kernel Debug Kits on https://developer.apple.com/download/more/ appears to be for developer seeds or beta releases, making it hard to debug kernel extension problems unless you can reproduce it on a prerelease system. Is this an accidental omission or has there been a decision at some point to stop releasing KDKs for release builds?
For example there is no KDK for the current High Sierra build 17A405 but there are several for the beta and prerelease seeds, the latest being 17A362a.