Echostar has spare satellites in orbit, and in theory could move one to cover E3 if needed, it would take a week or so for one to move over after getting authorization from the FCC. E3's heat problems were found of course after it was in orbit. It has also had a few transponders fail, and lately there has been no transmission on T28.
I am sure E* would transmit for VOOM for the right amount of compensation, of course that might include the ability to sell all the "exclusive channels" to Dish customers....