I don't mind paying to replace the amp(too much). Hopefully it would be an updated version, as mine is a v1. Although I don't know if later versions shared the shape amp shape.
For now I just turn it off when I'm not watching TV. Just knowing it's there erks me though. Should be silent.
It would be very important to tell them the amp version v1 and also if you will need the adapter they ship with their subwoofers with the replacement amp. Not sure if the connection you are using currently is RCA or XLR. It wouldn't hurt to also measure the length of the wires that make the connections to make sure your replacement is the same for proper orientation and installation of the new plate amp.
