A Body (Duster/Demon/Dart Sport Rear Window Louvers???

I have seen many posts on these forums about the "Very Rare" Rear window Louvers for Dusters. Can anyone tell me if there was ever any reproductions made? I have the metal working capabilities ans access to the tools to fab them. Where can I get dimension drawings of these units or is there someone ou thtere with a set of the original units willing to supply me with the data I need?:cheers: