Kitchen stove vent that operates from inside?

Ours had two flaps: A plastic POS on the outside that had to be released manually and a metal flap built into the microwave. When the plastic one broke, I replaced it with a vent cover that had no flap (just horizontal slots) and I glued a piece of screen to the back side of the cover. Now I no longer have to open/close a flap that is 8' off the ground; however, the metal flap still makes noise in a strong breeze. Maybe someday I'll add the magnet to it as suggested in an earlier post.