We will go around in circles but with this cover-up you are talking about, you should be contacting Dateline, not posting on Lets Run.
Doctors make plenty of money, so they are not going to sell Chinese drugs (brought to you by the same people who poison their children) to kids who are hoping to run a little bit faster.
And you are bringing the police into it? So if a doctor is friendly with the police in town, they will turn the other eye, especially if it's steroids or testosterone, which are schedule 3 drugs? They won't perform a raid if you leave a few donuts at their office?
And finally, the postman? Seriously? So if you leave the postman the occasional milk and cookies, he will bring you your drugs in the mail (keep in mind, he's a federal employee)? And how would you even do that? Give him a two week heads up and say "hey Newman, I have some shady drugs coming from China and Eastern Europe. Be on the lookup for them so nothing happens to them. They are the box labeled: "steroids and HGH").
This is when I walk away.
PS: the world is round.