can you get an extra headset for model MDRRF985RK
we want to buy the Sony - Wireless FM Over-the-Ear Headphones Model: MDRRF985RK and then also buy an additional separate headphone to go with it. will both headphones work with one transmitter unit and will the users be able to adjust the volume on each of their headphones individually and other people in the room also hear the tv? how much is the additional extra headphone and how can/where can I buy it? I see the headphone/transmitter model combo on the website, but don't see the headset alone.