I'm looking at the same issue. My plan is to take the current TV that came with the AS and move that one to the bedroom. Attaching the swivel mount to the wall adjacent to the shower can be tricky, but it looks like someone already has done that.
To replace the one from the front, I'm going with a Jensen 26" 12 volt
and mount it to the existing swivel mount. Jensen is dual voltage and has a strong reputation for being bullet proof for RV's. With the 12 volt
operation we can use it dry camping without an inverter or generator.