I'd try to contact a local machine shop. That's not too hard of a project, and I'd rather try to contract a local guy to in person explain, design, and approve what I would want.
Once that is done, you will want them powdercoated, either in color or clear. Remember the powdercoat will very slightly adjust the opening in the center of the bezel.
Would it be easier to just get a new piece of teak, and drill/cut new holes???