Contact Russ at
rtcobra@comcast.net He makes bezels for cobras and may be able to make custom ones exactly to fit your needs.
Anyone with good machine shop skill can make what you need. Just have very accurate drawings for them to use. So mock everything up. Figure out what rubber seals you plan on using, how the seals fit in conjunction with the hole in the body, where the fasteners will go. Try to use nut-serts in the body as your fasteners. But if the holes are too big in the body you may not be able to, etc. etc.
The oval bezel could be a bit more difficult. But with all the CNC machines out there you should be able to meet your objectives.
I plan on machining my own in my shop. but I won't being doing it for a while, so much else to do.
Good luck, Arthur