The OP is right, they have been sold out about 7-8 years. It will be interesting to see what happens with them shortly. The "contract" when you bought them called for 10 years and the time is coming. It said they would not be pulle at expiration but rather not replaced as they damaged. My understanding from talking to a few CM's and looking at some of them, is they did not hold up well and already had a high level of replacements.