I don't know if they're still selling them, but I have masks from Outdoor Research which have removable, replaceable filters. They are not (K)N95 rated, however.
Edit: I should have just looked it up really quickly. They are still available if you're interested in trying those. It looks like they're going to stop producing/selling them soon.
https://www.outdoorresearch.com/collections/face-masks-and-filters