I'm trying to figure out exactly which components I need to make the rear IR input on the 990 function for zone 2. I have a couple of speakers out on a deck that's about 35 feet away from the 990 with a direct line of sight through a window but it's facing the side of the 990 so I can't use the front receiver for zone 2. What is the minimum I need to add for a second IR receiver say 10 feet away from the 990? Do I need these IR blocks etc. or is there some kind of a simple single reciever unit with a wire that will plug directly into the 990 instead of screwing around with systems intended for whole house control.