If you are ready to shove some $$$ in, pretty much all the flagship scooters from big brands can take you well over 50 miles. Nami, Kaabo, Vsett, Dualtron just to name a few. Personally if money is no object I would take the Thunder / Storm, as they are both well know for range + build quality.
Anything further than that I think you are looking at the wrong mode of transport.