There are people on here who have received N in the US. I don't know the number or success rate.
I know there have been some who have had to order twice because of being intercepted by customs.
I have seen some that have taken a couple weeks and some that have taken over a month. (Due to customs)
This was when it was shipped US postal service or Fed Ex.
I think now A is shipping by private courier, so it should come sooner.
There is a "Getting N From A Megathread" on here somewhere that should help as well.
I haven't looked at it recently but I'm sure it's still here.
Also … I don't know for sure but you may have to be there to sign for the package. I did but that was before he was shipping private courier.