I’ve been working with a group that has been focusing on using widely-available Halyard H600 surgical wrap as a filter material that is N95-capable by design. They have found that BVM masks are widely available and can be sterilized and re-used, though they are typically discarded after surgery. There is an existing design for an adapter to use the H600 fabric as filter material in a fitting to use with those masks.
However, the existing design is fiddly to print, and has voids with sharp corners — it doesn’t look particularly sanitary to me. I have a much simpler design that should be trivially easy to print and I’d like to iterate to solution with someone near one of the hotspots. NYC, NJ, Detroit, Boston. If you have a 3D printer and are in one of those areas, I’d like to work with you on getting this design widely usable. I think it will only need a few test prints.