http://www.stranoparts.com/partdetails.php...5&ModelID=7

$509, shipped to the continential US for free...... Some folks have invalid pricing on their sites still, but you generally find this unit for $515-520 plus shipping and/or handling charges. I've got it for a few bucks less, and I'm shipping it for free within the states.

This is the carbon clutched Eaton LSD. It is user rebuildable, and fits any series 3 gear set.