Custom fonts vs TTF fonts for GUI class

Bump from this post and this post RE: Custom fonts and the GUI class.

Did anyone find a solution? Is it possible to use a custom font with the GUI class (i.e. full color image fonts) or must we use only TTF fonts with the new GUI?

Unity only supports inclusion of TTF fonts in your project folder (as per the docs) and those are the only ones supported in the new Unity GUI.