I have a bag of chaeto with amphiopods in it.. if you are willing to pick it up in jersey..if not just ask someone local to spare a zip lock bag of chaeto...that would be enough to seed your tank unless you have dragonites and fish like that in there..
You could get it at new world, or you can get it from me for 0$. I can give you a small ball and there should be copepods and amphs on it. I wouldn't pay for it. There are plenty of people here on MR that cut their crop frequently and give it away.