Quoted from JodyG:
A new batch of Premium machines was made last July for Australia...I am still trying to track down the post from last fall where someone was on a tour and saw new pros being built. Stern has never announced on social media that GB was no longer being made, like they did for Metallica and others.
Yes. Automated had new Pros/Premiums in stock back in the Spring. Who knows. If they do anything they might go Pro route like they did for GOT. But that is wishful thinking.