Thermaltake Riing 12 Series High Static Pressure 120mm Circular Red LED Ring Case/Radiator Fan CL-F038-PL12RE-A
https://www.newegg.com/Product/Product.aspx?Item=N82E16835106323
It can be done , you need to remove the bracket from the other fan and attach to this one.
http://www.thermaltake.com/products-model.aspx?id=c_00002638