Unless you have a case with a window, I would get creative and save some cash!!! Make your own fan bracket.
Get a couple of screw down PCI slot covers (The ones you tossed after putting PCI cards in your case. Most have a hole on the opposite end from the screw down side. Use 2 of them and bend the heck out of them making them flat (not "L" shaped.) Mount the fan with screws to the holes I was referring too. Slide the normal screw ends under 2 of the screws that hold down you other PCI cards.Cut a hole in the side of your case for air flow above the fan. Bend the homemade bracket so it will not interfere with you PCI cards and so the fan will be close but not touching the side of your case.
Hope that makes sense! If not, I will try to take some pictures of what I am talking about tonight if you want...
Warwick<FONT face=Arial size=2></FONT>