I need a way to find a font usage or PERMANENTLY replacing?

I have a flash project (.fla) file provided without the used (pixel) font. It contains 100 or more library items, every containing also one or more text labels.
I decided to replace them permanently with my own fonts (also to replace them at library object level).
It’s a way to find a (missing) font usage? Also to find all objects that uses this font? Or to replace them PERMANENTLY (not via font mapping…)?

Tks in advance for any solution!