I plan on buying several smb's that use inflation bottles. Looking at the Dive Seekers, APD, and Aquatec Mother buoy. The mini bottles and din valves seem to be hard to come by. I have only seen them offered by APD. Does anyone know a source in the US for these? .1 and .4 liters. Preferably DOT marked ones. I have a few new old stock Catalina Cliffdiv bottles that have the 14mm threading. Marked m207, ew0029069. Not sure what size they are but looking for any affordable options.