Your profile says you have a 16g. When I was on a 16g I had both factory fans. I trimmed the driver side shroud and blades a little but still worked great. If you go aftermarket, I would just get one somewhat close to factory dimensions and wire it up to factory wiring.
It will be a project as the gs likely has the 420a motor, motor mounts are different and such. So it will take some fabbing. I'm not too familiar on which NA yrs and models came with the mitsu 2.4 motor. If its the 2.4 it will be a simple swap everything over affair...
Does your car cold start every time? just troubles with warm/hot starts? If you modulate the throttle for hot starts will it start and then stay running/idle after 30sec-60sec of throttle modulation?
No vehicle profile? what year is the car? you can cross reference the sensor part number and find one from another car at a junkyard (probably a Chrysler/dodge)