I had a Hopper with 2 Joey's. I just returned one of the Joey's to Dish, so now I have a Hopper and one Joey. Could I purchase (from Ebay or wherever) a standalone receiver like a 211 and plug it in where the previous Joey was? If not, how much more is it to have 2 Hopper's? Do they work independently of each other? Never tried this before, and I don't want to spend a lot of $$$$$$$$