I purchased this today from Dell parts: MH0HN Assembly, Heatsink, Central Processor Unit,95W,L-COOLER,R6.  I believe this is the liquid cooler for the Aurora r12; price $109.00 plus tax.  It will ship Dec. 20th.
I want to buy an OEM Dell liquid cooler for my new Alienware Aurora R12.  How long has Dell been back ordered? I know about the other options such as a Corsair h60. But since my system is new (Black Friday deal so couldn't add the liquid cooling when ordered) I want the Dell Alienware MH0HN so it doesn't mess up my warranty. (I hope). From what I researched they are all the same between r7, r8, r9, r10, r11, r12.  Any info/leads is appreciated.  
Aurora R12, OEM liquid cooler MH0HN?