I have one of those grills on my Sunset Trail. It works great. The mount is a swing arm that you extend that brings it far enough away from the trailer bodywork that you can safely cook.
I'd like a bigger grill as I find it a bit small. Ideally, it would have a burner for pots too.
The issue is to find something that fits on the swing arm. It has two prongs that the grill fits on. I found one grill on the Camping World site that looks like it may fit, but there is no detailed information to know for sure - so probably a trip to check it out and measure.
So far, I find no cooktop/campstove that will work on the arm. A coleman stove on an aluminum table may be the next best thing. Another option may be to rig some kind of slide out table/tray in your outside kitchen to set a cooker on.
Good luck in your search