To be clear - the DIY kit purchase links posted in this thread are for making a LEGACY viking controller like the Tyr's Hand, Thor's Hammer or Odin's Raven. Modspace is a reputable dealer over in AU. The install isn't that bad.
If you are looking to build a macro controller on your own, we never have and never will sell the macro chip in kit form. They just aren't publicly available. And the install is a complete nightmare and takes two experienced trained techs working in tandem for an hour to install, and even then there are still sometimes problems that need troubleshooting.