If you are still under warranty, remove the bezel, drive to the dealer, tell them it cracked. If they ask how, just skirt around the issue cuz in reality they shouldnt care. if they want it back, say you tossed it.
Then say you want a replacement one. Just say YOU WANT A REPLACEMENT, and dont take no for an answer. They should say yes, its warranty. I drilled a hole into the "placeholder" button underneath the recirculating air button, cuz I wanted to put my AMP bass control there. I changed my mind, and did just what I described, and got a new one.