A drop-in replacement for the FR-provided 39" insignia non-smart TV is a vizio D40F (E1, F1, G9) 40" class. $200.
We are staying at a park with no cable and pretty bad OTA reception but good internet. We noticed the little vizio D-series I put in the bedroom was doing a little less pixellating on the OTA channels and it was full of free TV apps including pluto.tv which isn't half bad.
So today we went up to Target and picked up a D40F-G9 and it dropped right in and the sound works correctly on the irv-3 dvd/stereo.
Watching internet TV now very happy with it.
Pluto.tv ain't bad. Their business model is you get commercials just like regular tv so no fees and no sign-up required.
TT - 2021 Rockwood 2608BS
TV - 2020 F-250 XLT 4WD SRW 6.2L gas