You will not be able to get FTA with the smaller Directv type dish.
YOu will have to run 2 dishes, and 2 coaxes back to your tv set, and the 2 separate receivers.
The new dish will need to be 80cm or bigger
Free to air (FTA) Satellite Dish Offset Prime Focus Fortec Star Winegard KTI Patriot
That will get you what you need. If you want to see more that one satellite automatically, think about an H-H motor to move the dish to differnet satellites.
Motorized combo Satellite Dish with HH Motor, LNBF, Offset Prime Focus Fortec Star Winegard KTI Patriot