Temp Gauge Died

So, my temperature gauge conked out on the Power Tour. I'm not sure it was ever reading right, it would barely say 150 degrees even after 2 hours on the interstate non-stop. I don't think it's the voltage regulator, though, since the fuel gauge still works fine, and I don't think it was overheating, when I refilled the coolant I could see the coolant start flowing once the engine warmed up and it's never seemed to overheat. Does it sound like the gauge itself just died, and if so where can I get one and how do I change it?