I've only ever seen 13", 19", 25" and 27" bezels myself. There's probably one for the bigger 33" arcade monitors as well.
You could try to buy a 27" and cut out the inner area to accomodate the extra size, but you might be better off trying to make your own as mentioned. I'm going to try to make my own for a 17" PC monitor I'm using for a project.