Moved into a new space ~3 years ago, previous owner had installed new ceiling fans with remotes. Those remotes didn't have wall mounts and all of the dual gang switch boxes were left from previous fan toggle switches.
Modeled and printed these brackets to fit behind the empty space in the switch plate and hold the remotes in an accessible place where they wouldn't get lost.
Print remote holder upright with supports. I did mine in a white PLA and they've been fine for last 3 years.
The author marked this model as their own original creation.