Since you are asking for purchasing one without having to order online, as others have said - local machine shops or tool places, or Woodcraft or Rockler. I have never seen a 2 MT dead center at HF as mentioned above (and they don't list them online).
My experience on machine parts and stores - is that they generally are quite a bit higher than ordering. One of the cheapest is Grizzly but they charge too much for shipping for small items.