I am in search of a domestic fuel sending unit that will drop into the Toyota tank. I am no longer running the factory gauge setup in my rig, so I am lacking a fuel gauge. Since the factory sending unit is opposite of most other units, I can't find a gauge to match it. And its kind of frustrating not knowing how much fuel is in the tank. So my question is: Is there a sending unit that will drop into the factory 87 tank to work with an aftermarket gauge?