Not darned enough of them came with a D44. They are hard to find, and most everybody knows to charge for them.
What's nice is the Ford 8.8 is rated about as strong, and you can get them a lot cheaper, even with discs and a limited slip from a Mountaineer. You still have to fix the cables, driveshaft, etc, but you still get to use your present wheels, and it's within an inch of matching the width.
D44's are nice, 8.8's are, too. It's a mod, either way.