I've tried using FFT Patcher (the 352 version that has the font tab). It seems to modify the character widths to my chosen settings, but it doesn't update the actual characters in the font.
How can I change the characters for all the in-game text fonts?
How to add new special symbols to FFTacText? (http://ffhacktics.com/smf/index.php?topic=10280.0)
Which font letters can be replaced and how to type them in FFTactext? (http://ffhacktics.com/smf/index.php?topic=9694.0) (This topic is mentioned in the first one)
I can't really help more than linking these topics. Hope you can figure it out!
Well, thanks for the suggestion. I don't feel like manually hex editing hundreds of individual values. If anyone knows of a way that doesn't require me to manually hex edit, please let me know! Not that hex editing is difficult, but it can be tedious... especially in this case.
There isn't one. No quick and easy tools for the task exist.