Its official:
Aug 29/06: A General Dynamics release says that the U.S. Army has awarded General Dynamics Land Systems $45 million to produce and install 505 Tank Urban Survivability Kits (TUSK) for Abrams main battle tanks supporting Operation Iraqi Freedom. We asked GDLS how this fit with the $21.7 million Aug 10/06 contract; they replied that their announcement covers two contracts - the earlier contract for buying the material, building and kitting the gear that comprises the TUSK upgrade. The balance is for the labor associated with installing them. Which, for those of us who have taken our cars in for upgrades or repairs, seems about right.
http://www.defenseindustrydaily.com/2006/08/street-fighters-m1-abrams-tusk-tank-conversions-updated/index.php#more