No, I'm sure that these are 'one-offs' because of the Leipzig Mahlerfest. They used many different orchestras and conductors during that festival. What I DO wish that Accentus would do, is issue the entire festival! But I guess that that's just an impossibility.
By the way, I'm keeping the DVD of the Abbado/LFO M3. I might get the M7 as well. The M6 is a tad too relaxed for my taste.