I have two Sospenders World Class (automatic) inflatable life preservers that the wife and I absolutely love; however, I am having trouble finding re-arming kits for them all of a sudden. I need a 38 gram CO2 cartridge with 3/8" threads and can only find cartridges with 1/2" threads. I've tried Bass Pro and Cabella's and have not had any luck. I have the number for Stearns, but they are closed for the weekend already. Has anyone else run across this issue?