As an interesting side note, the breather mask itself was later reused to make the space helmets for Troy and Dillon in the "Galactica 1980"-episode "Spaceball"
So would I! What confuses me is the faceshield (that kind of plexi is tough to do without presice specs). That was obviously made to fit the mask. I just find it hard to believe that this didn't start from something.
I've wanted one of these for years! I had kind of written it off. I seem to remember a few of the model kits named at some point but I can't remember where. Maybe over on ASAP.