I also bought from abc-superstore. Really great service and ships to US in plain packaging to avoid customs. Still, some of those custom-made masks are pretty good but ridiculously expensive.
abc-superstore seems to add new gas mask sets and rebreathing bags to the list. There is a mask that the store is selling that goes along with a modified diving cylinder and another 40mm DIN connector. Anyone else know how to modify diving cylinders to gas masks like Rubaquabiggi, Natalia, and Mistress Madieanne? I have never seen a cylinder like that in the US. I've included some pics of Roxy who is wearing the same gas mask but with a scuba breathing apparatus and some parts I want to assemble. Can anyone list me the parts I want so I can know what they are?