It was me who shut m2.neo4j.org
down recently. We were no longer using it ourselves and thought it was safe to shut down, because we thought it was just a mirror for Maven Central. It _used to_ host snapshot artifacts for us, but we no longer produce those.
A better solution of course would be to find that 2.0.1 artifact and publish it to Maven Central. I have CC'ed my colleague Michael who might know something - Michael? I also wonder if alternatives exist, again Michael will know.
Lastly, we would be able to start the thing up again for some time, but we really want to retire m2.neo4j.org
Hope that helps!