Well, I posted earlier that I thought it a bit weird you could buy them, but I have the original for mine. However, all the print is worn off. Only the stamed numbers are legible. I would keep both of course.
Classic Parts of America sells the 1/2 ton plates out of their catalogue, so I figure it must be alright to do. That plate was actually shipped to Washington, because my brother in law lives in Clinton. He is my US mail box. >_<