Whatever you do, do not use the same address again that you used and got the customs letter. They do keep a paper trail and you can get busted. I have been busted before but, it was not for AAS it was for weed, several years ago I "allegedly" was getting weed mailed to me from the netherlands. If it's a felony amount they can do something about it, mine was barely over but the thing was that I had customs seizure letters sent to that address in the past and when I got busted, I went to pick up the package from my mail center they had a postal inspector inside waiting for me to pick it up, I got there and they asked me to sign for it (I never had to sign for my packages before even though it's international) I didn't think anything of it but, when I got outside and in my car, cops came from behind the bulding in their cars with their guns drawn.
So, anybody thinking it's far fetched that you can't get busted. You can, and I did try to tell them that I didn't know how it got there, since it didn't have my name on the package, always used a fake name but, they said that there was a paper trail from the previous seizures.
So, make sure any time you get that letter to change addresses. If it's a felony amount they can do something about it, and with AAS though I don't have much experience it's all felony amounts so I don't know how much is enough for them to make a move. I wouldn't order it internationally at all because of customs at least if you're domestic you don't have to worry about customs.