Sorry bud, I can't give you a specific part number, or even a brand name. It was 5 years ago that installed that fan!
I'll tell you what though, all I did was go to my local auto parts store and picked up both the fan and the thermostat. As I said, don't bother wasting any money on an electronic thermostat. A mechanical one is much more reliable. You can also wire it with a 3-way switch to manually override the automatic operation of the thermostat, either on or off.
If you can't find a fan or thermostat at a reasonable price locally, you can order them from J.C. Whitney. A 14-inch fan fits, but a 12-inch gives better clearance at the water pump pulley. Make sure you mount the fan very securely to the radiator, but don't damage the radiator fins. My fan has 4 mounting holes in the shroud, so two of them I bolted through holes that I drilled in the flat metal at the side of the radiator, and the other two I mounted with the supplied hardware that pushes through the radiator fins. If you don't mount the fan securely, it'll blow in the wind and chew up the radiator fins.
After removing the stock fan clutch, you can "double-nut" the four water pump studs to remove them and replace them with some regular bolts. This will give you another 1/2-inch of clearance. Also, remember to remove the stock fan shroud. You won't need it with an electric fan because it should have its own shroud. It really frees up a lot more room to work on the front of your engine!
Suzuki Tech Editor: http://www.Off-Road.com