The prints are pretty durable. You can create very strong parts if you print it in ABS, but PETG and even PLA are fine too as long as you don't have to worry about heat. I've printed blast gates and stop blocks using PLA and expect them to last many, many years. UV light is one of the biggest enemy of plastic, if it needs to be outside that will significantly decrease the life expectancy.
You will need to create a custom 3D model of the bezel, since it's unlikely someone has already built one. You'd use 3D modeling software such as Sketchup or Fusion360, then export/ slice/ print it. The modeling itself is fairly straightforward if you have the measurements, but there is usually some tweaking to do for tight-fitting parts. For example, you may find that a tab or recess has to be adjusted ever so slightly for a good fit.
It doesn't take a math genius to figure out that parts custom built this way won't be terribly affordable. By the time an experienced engineer has provided you with a proposal, gotten the specs, built the model, sent you the result, billed you, and made any adjustments necessary you're looking at $50 - $200 for even the simplest of designs. And then you still need to print it. A better option is to make friends with someone who is good at modeling, retired, and is desperate to justify the purchase of the printer to his or her spouse
There is software available that can create the model from photos, but this is more to duplicate things like a statue/ sculpture, not machined parts. Maybe i a couple of years....