jim31886
I was going to ask if you had looked at the Roku Tabletop Remote, but I don't see it in the store any longer.
You didn't say what device you have, but if it's not a stick, and not a Roku TV, then any universal remote that supports Roku code set (most do) will work. Keep in mind that Up, Down, Left, Right, OK buttons are needed, with Play, Pause, Resume (possibly) needed for in-app functionality. An Options button may be helpful as well when it comes to turning captions on/off within an app (some apps don't support device settings, and you have to control within the app, and that requires an Options button).
User Tivoburkee is quite knowledgeable about third party remotes, and may have a suggestion.