CCI controls is out of business. Safe-T-Alert makes a replacement with the shut off solenoid at the tank. However, I believe it is a combo unit for CO and LP. I think it is available from Amazon for a gazillion dollars!. While at the Beaver Quartzite rally, Lamar's solenoid quit working and he told me to remove it so his stove would work. I think the original technology has since come and gone because there are no manufacturers installing those systems anymore. Just the detector combo. Fred