Contact Dell sales, part MH0HN, last I checked it was $109. Or buy a corsair h60 from bestbuy.  It uses the same threading as the oem cooler so install is easy.
Hey everyone, I recently purchased an R11 that was air cooled as opposed to liquid cooled primarily because it was in stock at Best Buy thus I could have it to game during the long holiday vacation coming up, whereas all the liquid cooled options from Dell etc appeared to ship after New Year. What I'd like to know is if it is possible to upgrade the air cooled version of the R11 to the liquid cooled version? If so, does anyone know what part/model number I would need and where I could order it from? The specs on my machine are below: Intel Core i7 10700F16GB MemoryNVIDIA GeForce RTX 2080 SUPER1TB HDD + 512GB SSD Thanks.  
Aurora R11, upgraded from air cooled to liquid cooled post purchase?