screw amazon, just go to 3m's website and search for distributors there. It's where I got my masks. You can still get

https://www.amazon.com/3M-Respirator-6300-Respiratory-Protection/dp/B007JZ1MK6/ref=pd_sbs_328_7?_encoding=UTF8&pd_rd_i=B007JZ1MK6&pd_rd_r=964d62d3-5d2d-423f-ab1c-266940503ca1&pd_rd_w=XjHdC&pd_rd_wg=fbbXc&pf_rd_p=bdd201df-734f-454e-883c-73b0d8ccd4c3&pf_rd_r=B4E8ABG700AXPZMEP4MB&psc=1&refRID=B4E8ABG700AXPZMEP4MB

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amazon will ship this. I have two. The cartridge are cheap too