WTB US twitter replies

we have a big twitter campaign to launch requiring 10000 real tweet replies, 10000 is our aim, the more the better, all must be registered in the US. and it must be made from real active users. first we do some large scale custom replies under one popular tweet, then we try to retweet/likes some of them and make them stick on top of the reply list so other people can see and continue the discussion, that's our final goal. We have a good budget for it.