The obvious issue here is the p100 p/n 2097 filters are simply not available anywhere. Understandably so. I have a decent supply of N95's. Had them long before the coronavirus stuff broke. So I'm good for quite a while but I'd like to switch to a 3M 7000 series half face respirator. Is there a cartridge that might be readily available and would be safe to use in knifemaking? I'm not real hip on what works and what doesn't. I know the N95's are good and I assume the p100's are the standard? What else is better than good for the 3M 7000 series?