You can make one go here,bottom right of page.
http://www.moparts.org/Tech/ It`s not identicle to an original and wont fool anyone, but at least you can take this to shows and not worry if it gets damaged. Open the forms that end in .doc and enter your info in the spaces then just print it on your computer. They only list years 69,70,71. If your year is not one of those simply change the year to what you want. Oh yeah did I mention it`s free!
Here is one of my originals and one I made just for kicks. I never tried but if you want to age it a bit crumple it up and toss it in a cup of coffee or coca cola if it gets ruined who cares print another one!