I've not done this yet, but I did the measuring, a Standard 30 inch Kitchen range hood could replace the one that came with the RV.
For power, tap a line off the Microwave outlet. The typical low cost kitchen range hood has a little more depth, which would really help reach out for the front burner. Even a budget range hood's 110 Volt AC motor will be no more noisy than the 12 Volt DC motor that runs the vent.
Marv