There are many good cyclones Torit, Donaldson, JDS, Oneida, Grizzly, Clearvue, Jet, Delta, etc, but finding one locally will be a challenge. There may be a store or two in Raleigh, Charlotte, or Greensboro that does, but I am not sure of one. Additionally, there is the duct/pipe to get.
I would suggest checking all of the Craigslists in the above cities and calling Klingspor and Woodcraft in the respective cities. You might also check woodweb and ebay for someone selling one in the area.
Now that I think about it, I bet you can find one at J and G machinery in Sanford.
Good luck