No Quarter, I've been think about doing the same thing...one bright LED on the dash somewhere possibly with a blinking feature would be great. I've not see a dual sending unit either but you'd think one would exist with all the electronics available.
My old McLaren had just that, but used the T to mount the sending unit...back when it was raced in the CanAm series by George Eaton, a two or three inch tail light was mounted just to the left of the steering wheel (right hand drive) just slightly below the line of sight of the track...it stuck out like a sore thumb and was somewhat crude by today's standards but I'm sure it saved a few expensive engines.
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