Aetherine equipment part I

The main thing that a force of airship-troopers needs (beyond uniforms, weapons and ammo) I would think would be some sort of breathing apparatus. I'm thinking something like a small aqualung, that could function (for gaming purposes at least) at high altitudes on Earth or as an aid to breathing in the rarified airs of the Martian Highlands (guess where I'm thinking of going next?)

A facemask, tubes and a small cylinder sounds do-able, but I'd need something that can be replicated many times over. After all if I'm going to have a squad or two of these chaps I'm going to need 10-20 of these Brass Lungs.

Now tubes made from guitar strings shouldn't present too much problem, and I may be able to find enough circular sprue to make the cylinders, but I really don't know what to do about the facemasks.

Time for a ponder and a poke about in the bits box I think...