My distribute said to me that although Stern has the rights to produce ACDC until year-end, that the second part of that contract was a numbers issue. Essentially, they have already produced the maximum number of units for the timeframe.
ie: licence to produce until Dec 31, 2014, or 6,000 units. -Whichever comes first.
It's my understanding that no new ACDCs are being made. (Not sure about the Pro models. Wonder if the agreements are separate for each version?)