I came across thus page yesterday while looking for cold weather work gloves for my son. (Sun zero temps). They sell made in the USA k-95 masks.
I don’t know anything about this company. I have a call in to them and probably won’t hear back till Tuesday.
https://www.mdsassociates.com/
No “k”, just N95—because they are made in the USA.
Here’s the manufacturer’s story: https://www.mdsassociates.com/shatkin-first-disposable-filtering-facepiece-respirators