Illustrator :: Set Default Substitute Fonts?

With other software in the past, I have been able to set a default substitue font for a specific font not in my system, but I cannot see how to do this in Illustrator.
 
Another designer uses the same font as me, but his computer has labeled it differently, so every time I open a file in which he has used that font, Illustrator says the font is missing.  instead of having to go in and manually change the font every time I open a files he has worked on, I would like to set Illustrator to automatically change the font on opening.