I was trying to add SQALE plugin for SonarQube. I was doing some research and there was a SonarSource blog (https://blog.sonarsource.com/sqale-the-ultimate-quality-model-to-assess-technical-debt) talks about a commercial SQALE plugin for Sonar, but the link to the plugin gives a 404.
Is there any other documentation for SQALE plugin or is it something fully out from Sonar?, the official SQALE website still refers Sonar for implementation.