Another US source with whom I’ve had good experience is http://www.cemproducts.com/
They don’t sell bulk power. It’s all mixed in liquid form. But, if you’re nervous about the money- or Customs-weirdness of dealing with an off-shore source like Elitenet, cemproducts has been straight with me so far. The talalafil I got from them a year or so ago worked well.
But, I also got some drugs from Elitenet a few months ago without any problems. I got the slip in my mailbox saying the stuff was at my local USPS mail center, so it’s a bit of a hassle finding time to get over there. The box was completely wrapped up in shipping tape. Then, once I got that opened there was another package inside consisting of bubble wrap completely wrapped up in more shipping tape, with the goods inside all that. The outside was labeled ‘Cosmetics.’