A bag you say... Maybe you have some extras to pawn off? I'm in search of 3.Awesome!
There's a file for one that folds on Cults that's a little more accurate than the ones on thingiverse that I ended up buying.
I have a //bag// of the YKK buckles now- had to to get the screen accurate ones. Debated printing it though. What'd you use for the mask straps?
I went with elastic velcro-type.