Are you talking about the Rapid Camp remote that can control the levelers, awning and generator? I would think the a dealer could order you a replacement.
Or do you have the Firefly Panel? The Firefly Panel can be controlled with an app and your cell phone via Bluetooth.
I am looking for a remote to operate the control panel inside my 2018 Thor Quantum WS31 f450 rv any ideas other than calling Thor they are no help.
Get the app from the App Store. It will communicate over Bluetooth for lights and hvac. For safety reasons, you can only do the mechanical stuff (slides, stabs, bunk lifts) from the control panel, but being able to change the temps from the back of the coach is nice with the app.