I tried different things like Apex and DMM for Maya. Apex is not supported in unity and I had trouble exporting my fractured mesh with DMM. Also some voronoi based scripts that did not work in Maya 2013 because they were outdated.
If the source is availlable for the DMM exporter, modify it until it works. If not, write your own exporter. That mind sound a bit ridiculous, but trust me, it's the only approach I know that works for this type of problem (and luckily Maya is very good at giving you access to the actual data you need). See my old site http://nccastaff.bournemouth.ac.uk/jmacey/RobTheBloke/www/ if you need a crash course in the maya API.