Is it possible that the "C" part of that code is actually a 6? All the color codes seem to be letter/number/number, not a letter/number/letter.

In any case, I recommend this supplier https://www.automotivetouchup.com/, and you should call the number on the site and ask them to help you find the color (as they suggest you do). They have all the colors, but they are not always filed under the right make/model/year. I called when I couldn't find a color for my two tone truck, and they had it, it was just under a different model.
A quick search shows Y96, which might or might not be what you need, under a '93 Mirage https://www.automotivetouchup.com/to...i/1993/mirage/

Good luck.