I had to do a couple of my vent covers a couple years back. problem with mine is it is so old no one makes the exact unit anymore so it is either replace the whole vent or buy a genaric cover and make it work with my hardware. last year I had to reseal the cabover emergency exit, I wanted to put one of thoes new fancy Heki ones in it but I almost choked when I saw the price of them, so I think I will just put a hangs vent into the bathroom of the camper since we won't be upgrading for a couple years now. I had to buy a new car to comute to work and back so that in biting into my camper budgit haha.