Myself and some others are of the opinion that if important documents and tags (such as the fender tag) are missing they should stay missing.
Yes you can get "replacement" tags. But that is why there are so many fakes out there. If these things were illegal to replace (and some such as the dash tag are) then we would have so many highly optioned fake cars out there.
But you can try this guy.
http://www.gvgovier.com/fendertag.htm