Years ago there were very few "accurate" vehicles for HO scale. As I mentioned, Alloy Forms offered some excellent white metal cars and trucks for the transition era. I have at least one of each, if not more. Moving to more recent years, other manufacturers such as Busch, Motor Max, Woodland Scenics, Jordan, Schuco, and other have offered some good looking vehicles. Classic Metal Works has probably offered the widest variety of vehicles for the transition era recently. Neo makes some really good looking cars, but they are a bit pricey. All are an improvement over using out of scale Match Box cars.