Since I do not have to use oxygen, thank goodness, I am not exactly sure what you are looking for. Have you tried to find it on line? That is too bad that someone stole yours.
I am always very protective of my nebulizer because it is small and portable and I can use it in the car. But, it looks like it could be a camera case. I'm always afraid someone will snatch it and it won't do them any good and I will be in big trouble until I can get another one.
I wish you the best!
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Epilepsy, asthma, fibromyalgia, GERD, depression, hypothyroidism, tinnitus