Today I learned that in 2015 the Obama administration authorized a set of machines that allowed "rapid pandemic mask production line". Basically instead of needing to store and maintain them, these machines would allow 1.5 million masks to be made per day if needed.
I remember a few people in my circle talking about ideas on how to repurpose (One time use medical coverings for emergency work in diaster prone states and cities, like New Orleans was one) it when they heard but it all was expensive, very time consuming to switch back, and you would still need some stockpile at that point.
In 2018 it was cancelled.