Tamiya did a set of three M60 based motorized kits, the straight M60, M60A1 and M60A1E1 (prototype M60A2) all basically the exact same kit with a different turret sprue. Kitech and Zhengdefu did the M60A3 and M60A1 but are also motorized toys.
Beyond that Fujimi did a 1/50-1/48 scale M48A2. I have all the kits I've mentioned and it compares in scale to the Tamiya kits as well as the old Monogram snap tite kit I've got. I't the original version but it's the same kit pictured above. None of these kits are serious models and are more like motorized toys.