I got the locker for $699 at
http://www.rearendparts.com/home.php
call them for it as it is not listed on their site "GM 9.25 IFS Eaton eLocker"
Comes with all the wires, switch, wire loom and everything else required is included in the box. The switch is really nice as it lights up with a pic of a locked diff illuminated on it.