Bill, I believe you'll have to "re-engineer" that yourself - the 2.0 engines GVs upto 2005shipped with a viscous coupled fan.
I've considered it, but never done anything more than push ideas around - primary reason being that my stock fan works fine, second reason is that I've never been able to find out what the CFM of the stock fan is, and the third reason is that good quality fans & controllers don't come cheap.
You have a bunch of different options - a single large 16" fan mounted to use the existing shroud and either run that full speed (relay switched) or variable speed (through a controller), or, two smaller fans side by side in a custom built shroud and then you can run those in series (low speed for low temp) or parallel (full speed for higher temp) - this last method is how Suzuki did it on the 2006+ GVs with the 2.0 engine - the fans are switched by the ECU, so whilst it may be possible to adapt the fans, you'll need to devise your own controls.
One thing I did find is that two smaller fans are capable of moving significantly more air than a single large one
93 - 1.3 Suzuki Swift GLX
98 - 1.8 Mitsubishi Pajero iO
98 - 2.0 Suzuki Grand Vitara