You don't NEED it to be for the BL.
Mine for example was made before the BL option was offered, and for a 2" BL, all you need is to drill three new holes ~ 1.25" higher on the frame horns, and use through bolts through the bumper's mounting plates to secure it. (You don't want it exactly 2" higher, as that makes the body flex against the bumper when off roading, etc...so 3/4" gap is about perfect to prevent that.)
Adding a simple "L" or "T" at the top ends of the frame horns, to give a place for a 4th bolt mounting at the front, locks it up solid as hell.
So, just throwing that out there if anyone is put off by the BL gap issue.