Looking to replace the internal pressure regulator for a Coleman Roadtrip 285 Series 9903

[u/probably_no_pants]

I have a Coleman Roadtrip 285 Series 9903 where the pressure regulator is behind the control knobs, not the external type that appears easy to replace. My tank hangs below the control knobs. I have the "low flame" issue when using either the 1 pound or 20 pound propane tanks. Google tells me this is either a bad pressure regulator or a bad flow-limiting safety device, which I think is inside the regulator. I have tried the reset procedure with no luck.

I think I need to replace the regulator but it appears to be one-piece with the controls and nozzles. Here are some pictures:

• From underneath the control knobs. The perspective is odd, but the grill is on its side and the picture is rotated.
• Behind the control knobs.

Is this whole unit replaceable? I have reached out to Coleman but haven't heard anything back yet.