Do a google search. Have the model number, too. Quick search came up with several of them.
http://www.nextag.com/convection-mic...c/compare-html
Not sure on removing the vent. The vent pulls the excess gas out of the coach when you are using the stove/oven. Without it, the gas build-up would trigger your safety sensor. Not to mention the chances of death.
If you have a roof vent at the stove area and use it when you cook, the over-the-stove exhaust fan could be eliminated.
My over-the-stove fan just recirculates the air - no outside exhaust. There is a super fan in the roof directly in front of the stove. We use it when cooking. stove fan stays off, but we use the light!
Good luck.