http://ffhacktics.com/smf/index.php?topic=5404.0
^^ This is the nearest thing I could find. Great sprites, but no portraits and presumably unfinished? So... I'm assuming no but there is no way I want to start a project like this if someone else has done it well already so I'm going to err on the side of caution and ask here.
Wanted to do a Radd replacement as well, but as near as I can tell only two characters (with duplicates) can be added pre mid-chapter 2 without running into issues (39 and 3A), so I'm going to just do Alicia and Lavian.
From what I can tell, r999 abandoned all of his sprite projects. Looking through that thread I did like the final revisions of each. I recommend you start with those, but that's just my opinion. Really, you can do whatever you want.
of course they are abandoned, R999 got banned and never came back