I have a Otterbox Defender Case and belt clip for a Droid Razr Maxx. I used it for almost 2 weeks, still like new, and then got the Droid Razr Maxx HD. To my knowledge it only fits the Razr Maxx. $25 ftf or $30 shipped.
http://www.otterbox.com/RAZR-MAXX-b...tart=2&cgid=droid-razr-maxx-by-motorola-cases
http://www.otterbox.com/RAZR-MAXX-b...tart=2&cgid=droid-razr-maxx-by-motorola-cases