Kind of depends on how fancy you want to get. Engraved aluminum is relatively easy - once I know the overall size I mock it up in CAD and select font sizes that scale up roughly to the original.
New from scratch. My fonts won’t be a perfect match, and my belt diagrams will be line art so might not be exactly the same. But, engraved on 1/16” aluminum with a 0.010” depth of cut they will last forever. I usually fill in the engravings with black nail polish or acrylic paint. When it fades or gets scuffed up a few minutes with acetone and a Scotchbrite pad and all the paint is gone, ready for a new coat.
Other option is engraving a photo image of the original plate, but really fiddly because I would need to do all the touchups and squaring up of the image before engraving. End result will not be as crisp as new from scratch, because it’s difficult to get all the text and lines straight.
Third option is laser engraved ABS, can get razor-sharp lines but it’s not as robust as the engraved aluminum. White lines on a black background.
A couple of samples. And it’s not 0.050 depth of cut, dyslexia strikes again!
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