Happened upon the actually dictionary while on Wikipedia, of all places! 201 pages.
Because the file size is too large to upload to the forum, here is the link to where I found it:
http://en.wikipedia.org/wiki/Yolngu_Matha
Scroll down a tad bit to find the link to the pdf of the dictionary. There are also a few grammer pdf's as well.
Enjoy.
-Simon