If you go to amazon.com and search for N1C1D it comes up. Does not look like it is in stock, and as always be careful when installing these if they are OEM. To bad Dell decided to omit these on air cooled systems. 
So I just got my Aurora R11 liquid cooled (it was air cooled before) and I see, I need a VRM heatsink. The part number is N1C1D and I've contacted Dell a couple times to see if they have stock but it's the same answer, they have no idea when they will have more stock. Now I am worried that my desktop will burn or what some problems without that heatsink. Does anyone know a third party that will or is making that part ? Please help.
Aurora R11, VRM heatsink