I am always thinking about new designs that my wife may like (which is a high bar). I noticed that she was temporarily distracted at Home Depot when she saw fancy vents. My design evolved a bit as I worked on it. Fully replacing the vent with a thicker PETG version worked until one of my kids sat on it as the heat was blowing out and gave it a giant rear-end indent. So I then explored a thin design that would simply snap onto the current vent to give it a nicer appearance without needing to worry about the strength. The snaps used on this design hold it firmly in place, but will release if you give it a little pressure (maybe using a butter knife). You should probably use PETG because of the temperature and strength benefits. I personally like the bamboo PETG because it has a nice matte finish. 

This design only fits on a larger printer like my H2D and won't work on anything smaller. (If there is a lot of demand we could look at a version that prints in 2 pieces and snaps together, but I think you would lose the aesthetic appeal).

I have several other designs I will be adding as new profiles soon. I hope you like it.