I recently installed 2 Hunter Contempo fans. They're 5xxxx series models, which means the remote is digitally paired rather than by dipswitch matching. Given the size of the remote, I knew we'd NOT find it when we needed it so I wanted a wall control, as well.
The switch boxes originally held 2 switches - one for the light and one for the fan. So I bought two sets of those snap-together switchplates - one side for decora switches and the other being a blank. (See photo)
Here's the important piece more me: I was able to pair this remote with the receiver that came with the fans. I didn't find any instructions specifically about this online, but there were remote-pairing references that were close enough that I could work out the following:
1. Turn off the fan.
2. Put batteries in the wall control
3. Turn on the fan.
4. Within 3 minutes, press the light-on button and the fan-on button on the wall control and hold them until the light blinks. The wall unit is now paired, and will work alongside the original remote.
The wall remote does NOT have to be hardwired to work, as I did the above before installing it in the wall. The hardwiring is about enabling the power button on the bottom of the unit. If you leave a regular switch controlling power to the fan, then this could function as a wall-mounted, battery-powered remote.
As is often the case, I paid twice what I needed to because I only needed the transmitter and not the receiver, but they don't sell them separately. I'd give it five stars if I could have bought just the control unit.
Nevertheless, I can now turn on the light when I walk into the room, rather than searching in the dark for the remote. And that was the goal.