Sepura Radio Covert Acoustic Earpiece/Headset with Earmoulds for Sepura STP8000 STP9000 SC20 SC21 Radios

You see that little pink piece of silicone in the pictures? I paid for this whole rig just to get that. It's clever. It holds the acoustic tube in your ear without blocking the rear like the mushroom does. You can hear your radio clearly but you don't lose ambient sound as well. That drives me crazy with the mushroom style earpiece. However I don't need a separate PTT switch and the set has so much wiring on it. In the end I took it all off my kit and just used the little pink bit on my issued earpiece. Why can't i just buy those little bits by themselves??