Thanks! I did mean the Brailsford converter. The other is easier but I must have a font in which two characters (ASCII 255 or lower) are changed to something else. (So I can't use Google fonts.) I can easily do that in a font editor but then how do I convert the altered font using atob or whatever Espruino can use?
I've been using my own correctly altered font for years and can use that if I can figure the Brailsford out, including creating an image for OpenGameArt to analyze. All of that entails further problems/questions.
Alternatively, I could try to extract a font from the Bangle, alter it, and put it back, although I don't know how to get it and replace it.
Further help is requested! I just need a way to produce the code Espruino needs, from my own font or from another that I can alter in the two simple ways.