My preference would be to re-chrome the originals, even if it costs a little bit more. That way you don't have to worry about the quality of the reproductions, or how well they fit.
But there are issues associated with getting your originals re-chromed. First you have to find a plater that you are comfortable with their work. Also, some of these guys are very busy and you might have to wait longer than you would like to get your originals back from plating. While they are at the plater's, you car is basically down until you get them returned, because without these pieces your back rest will not be in place.
So, it really is your choice. I don't know of chrome plater's in the Florida region, but the guy I have always used in the past for plating on my '69 stuff is Librandi's Plating in PA. All they basically do is classic car plating. If you go to Corvettes at Carlisle, or Spring or Fall Carlisle, Librandi's is always there and they do a big business at those shows. Here is a link to their website.
http://www.carchrome.com/
If you are not comfortable sending your pieces to PA, maybe some one on this site has a recommendation for a plater closer to you.
I hope this helps!
Rich