http://www.titantv.com is a tv guide. Titantv takes some time to figure out because it shows the parent stations and the rebroadcasting stations and is a little overly optimistic on transmitters that can be received. It is done this way because it is better to be optimistic then pesimistic. . Read and understand this
http://forum.tvfool.com/showthread.php?t=695 . Here are places to buy antennas and etc.
http://www.solidsignal.com ,
http://www.starkelectronic.com ,
http://www.amazon.com