Scott,
It would be a different situation if I wanted them to make me a tag from scratch without the original tag, but I have the original tag and all they have to do is punch the information onto a new piece of metal. I doubt that they will duplicate the inspectors stamp that is visible on the original tag.
I wanted a replacement tag so I could put it on the car for shows and keep the original in a safe place. A couple of years ago a friend got his stolen off his car at a local show, I don't want to be in the same position.