I would try the "mold the patch to fit then bake separately then glue in place
then paint to blend" method! (I thought about hyphenating that to make it "one
word" but figured you guys would hunt me down for that!)
Even though it's not really compatible with ceramic, I'd use acrylic paint to
repaint the nose since any tiny cracks at the join could be filled witht he
paint and blend in.
This is not a "perfect world" fix, but it sounds like the value of the item is
more sentimental than "antique" or something, and personally, that's about the
amount of work
I think repairs like this are worth!!

More "suitable"
repairs also are more work and fuss.
JMHO
Sherry