This fits my 34" tri metal KM with a Tagiers Phunnel bowl. if this doesnt do it no other will. This is the one I use because of the colors, I'm sure it's te same size, just makes it.
The one you showed is only 6.6" high, no way that's working, look at the height of your bowl and stem. You need 10.5 minimum in height and 4' diameter. better too big than having to build it up in height. It should rest on your tray and just cover the coals wth a little room to spare at the top. the 4" width is minimum to go round a med. Phunnel bowl. you need the height and they don't make that height less than 4" wide I think it has to be 4" or it would be too long and thin and defeat the purpose of all that height.