If you can't go back to the company that made it in the first place, get a piece of aluminum and have it anodized and laser engraved. Talk to Deere2210 and he can do both anodizing and laser engraving. If you can send him the old one, probably better as he can match the fonts as close as possible to the original. Now grant you, it won't look exactly like the original, but it will be awful close.
For instance, most are black and aluminum. He can anodize it black, block off what needs to be aluminum, laser engrave what needs to be done, then clear anodize everything to protect it.