The 308ME hasn't been officially discontinued but since late 2012, production has been suspended. Marlin continues to claim they intend on reintroducing the 308ME. Remington's problems have been many and the foremost has been production capacity. A good reason why it took so long for them to reintroduce the Marlin 444.
That said, my contact at Marlin claims the 308ME is next in line to bring back. Best one can do is let Remington know their is a demand for them.
That said, personally, I'd be diligently searching Guns International, Cabela's Library and Gun Broker for (JM) North Haven produced rifle. Their is one on Gun Broker right now for $875 if I recall the price correctly. A couple days ago it had a few days left to bid.