I have LST diffs in my Revo and used Traxxas Stub Axles with the threads cut off.
http://www3.towerhobbies.com/cgi-bin...?&I=LXHFY7&P=7
I think you can take the stub axle out of the driveshafts that you remove from the truck. Test fit that to make sure it fits, then cut the threads off with a dremel (I had to cut just a bit more than the threads so the end of the shaft would sit flush with the spider gear).
This picture should help:
http://s177.beta.photobucket.com/use...f78b3.jpg.html