Benzofurans were banned a long time ago in China. You won't find a Chinese vendor manufacturing or selling any of them. NL is the only place selling it now unless you go to the dark side maybe.
If it's in a normal envelope, like a birthday card, informed delivery will show it. If it's bigger than an envelope it probably won't be scanned by informed delivery.
From my experience they are extremely sloppy. For example, I bought 5-m@pb from them years ago and received brown powder WITH FUCKING GLITTER IN IT. No lie, at least 50 percent was glitter. Any competent vendor would see that before sending it out.
Packs from NL get delivered about 60-70 percent of the time in my experience. But if you're waiting longer than 6 weeks it's very likely that it's been seized.
Also you have to remember with the holidays AND covid happening there will probably be a few hiccups along the way at least.