If you already have the reciver, then you will need a DISH 300 with a single lnbf. See
Winegard DS4047 18" Dish Network Antenna D Tube 300
If you need a dish and receiver, then check D-4 here:
Dish Network Satellite Systems, HDTV, PVR, DISHPro, $49.99 Free
installation up to 4 TVs