We used to use the Dish Pathway X2 . . It allows you to watch ALL 3 satellites and will work on eastern arch or western arch. It also has 2 output ports - 1 for the main, and 1 for secondary.
The issue will be that whatever satellite the MAIN receiver is on is the satellite that the secondary will get stations at the same time ..SO, if your watching 2 TV;s and all is good.... IF the person on the main receiver changes the channel to watch something different, if that show is on a different satellite, the person watching the secondary TV will loose their signal.