The only way to make it 100% to chronomat evo date font, is to get a genuine, take the date font out. Then get a 1:1 copy of the font, print them out for the 7750, and refit it all. This is a time consuming and difficult project and sounds far too simple the way I have just phrased it.
I would stick with the fontalready in there, no body will notice, unless they also have the same replica, or are outstandingly observant and in which case, they know far too much about Breitlings and their datewheels hehe