https://www.amazon.com/Aura-Particulate-Respirator-Mask-White/dp/B08J1THV9G

This is a link for the 440 count box from Amazon's liquidation seller Woot. It should be noted that they will be expired or almost expiring but that's more of a NIOSH standard thing or something rather an indication of their continued function. Most mask blocs are buying warehouse liquidations of expired masks. The electrostatic filtration aspect should still be healthy, what you need to watch out for is degradation of the elastic and nose foam.

My understanding is that 3M auras are still the gold standard, but I personally use real KN95's since they're cheaper while also being black. NBC has a best masks list that they updated this very month, with purchase links to independent non-Amazon websites, but it's all KN95's.

~~Remember 3M is on the BDS list.~~ I assume the cheap old stock isn't a source of meaningful profit for them, but if the old stock should run dry, I believe there are Chinese clones of the Aura, and they can even be obtained in black, which is nice.

Edit: I got confused. While 3M undoubtedly supplies the MIC and therefore the nazi entity, the BDS list makers correctly judged 3M's consumer goods arm is not a priority target for mass boycott.

You could also contact a mask bloc in your area and ask them where they get theirs from. Find a mask bloc here: maskbloc.org

not guaranteed but I often see quantities of them in thrift shops

I got the huge box of aura from spamazon. Maybe they still have them? Unlikely but you could look.

Idk about "gold standard" but they are ok and conveniently packaged.