OK, so it seems like Atmel have provided people with a font that they seem to think is good for debugging.
Part of the blurb states
Excellent for printing system messages and debug output to a display.
Where is your display, the Due doesn't have one.
I can only assume they are meaning that it is to be used with the evaluation kit (SAM3X-EK)
which has a GLCD.
The Due does not have any form of display so the font is of no use to you. If it's debugging you need then either use one of the serial ports or get a JTAG or SWD debugger. If you need the font for some other purpose you could probably grab the data from a file somewhere in the ASF.
What did you want it for?
Rob