I ended up buying the Dust-B-Gone and the one recommend by Rob Keebler. Of the two I prefer Rob's choice. You can adjust the fit on it so nothing can get into your lungs, in fact I think if you were not careful you could end up passed out on the floor from lack of oxygen. The Dust-B-Gone is comfortable, but I'm still trying to figure out how the have to get $43.00 for it.
I was interested in the one that Glenn Bradley spoke of, and he said they were no longer available. I sent the Mfg an E-mail and received the following response. Passing it on in case Glenn may be interested in the reason it's no longer available.
Aearo Company has been acquired by 3M Company and all AOSafety Respiratory protection products have been discontinued
You cannot use another manufacturer’s cartridges on an AOSafety mask. It is a NIOSH requirement that cartridges and filters do not interchange between manufacturers. They want to know that the unit that was tested and assigned an approval number has not been altered.
We do not sell direct. I would check places like Sears, Ace, Sherwin Williams and other smaller outlets that might still have some on the shelf.
You can check out the 3M web site mmm.com or call 800-243-4630 to connect with 3M for information on 3M products.
Again thanks for everyone's help