How to buy good, FFP2 level, masks online while avoiding scams?

"Germany, Austria and France now mandate to have N95 respirators or other high-quality masks in public transportation and shops."

Clearly, the choice is masks made in China. There they are called KN95, and for America they are called N95. How to avoid fake masks and deceivers - their sellers?

 "My journey began on the website for the Centers for Disease Control and Prevention. There I found charts of N95 and KN95 masks that the agency has tested, including the make, model number and filtration efficiency.

After doing the research, I decided a KN95 mask from Powecom, a Chinese brand, was best for my purposes. The mask scored 99 percent filtration efficiency in the C.D.C.’s tests.

I visited the manufacturer’s website, which listed steps for verifying that a mask is real. That involved scanning a bar code on the package with a phone camera. Then I did a web search for the mask, which brought me to bonafidemasks.com, an online retailer that shows documentation stating that it is an authorized distributor of Powecom masks in the United States.

That was more reassuring. So I ordered a pack of 100 for $99. When the package arrived in the mail, I scanned the bar codes to confirm their authenticity. They were the real deal.
Another path I could have taken was to order masks directly from the manufacturer. Verified mask producers like DemeTech, in Miami, and Prestige Ameritech, in Texas, sell N95s through their websites.
But ordering directly from a manufacturer presents other challenges. Often you have to buy a large quantity to reduce the cost.

So what if you just want to buy a few to try on? Ms. Miller’s nonprofit Project N95 buys bulk orders of masks and breaks them up so people can buy smaller batches. “It’s a very painstaking process to go through,” she said."