Two Sunon 120 x 38mm fans $20 if you need fans and don't mind some noise. Petra's Tech Shop
Any fan will do, but the more air you move through the radiator, the more heat you can remove/lower your temps will be.
Use an old fan as a rad box. This assumes you have an old 120mm fan you can gut out?? All you have to do is take some snips and cut out the fan braces, then use the outer housing as a rad box. If you'd rather buy a RAD box, you can do that to for a price of coarse: Petra's Tech Shop
Other than that you might need a set of long bolts to mount the rad on the back of the case. Probably better to just get those from a home depot or hardware store though.