LS3: Apparently I need three coolant sensors

[ModernMuseum]

Engine: LS3
Radiator: from Prodigy Customs
Gauges: Dakota Digital Series III

To monitor and make all the systems work correctly, it appears that I need three sensors to make all this happen: one sensor for the ECU, one for the fan controller and one for the Dakota Digital gauges.

After some research, it appears that all three use different signals and there is no way to piggy back or combine any of them.

As far as I know, the LS3 only has two locations for sensors, which is at the back of each cylinder head. Am I going to have to tap into the water pump for another sensor? What is your recommendation?