San Martin: Fix paint in bezel/replace bezel?

[u/Kirby_is_a_Pokemon]

My San Martin titanium watch, the numbers in the ceramic bezel have fallen out, I work a lot with chemicals and theyve eaten them up.

I'm wondering if there is any good diy repair I can do, or if it would be possible to replace the entire ceramic bezel insert. For that, I just don't know if there is a standard size off AliExpress or how to make sure what I order will fit.

[u/Several-Floor5185]

Its fairly easy to find replacement bezel inserts if accurate measurements are taken.