I have two spare male plugs and honestly, I don't like either one. One looks like that Leviton linked above.
I think the wires should be clamped by the screws, not just tightened under a screw head. The Leviton and the other spare have just screws. So, I don't want to use those if I can avoid it. I'm interested in the CAMCO plugs. From what I can tell, at least one of their plugs uses clamping. But it doesn't seem every one they offer is made that way. Would rather get the larger one, if it's the only one that clamps, and cut the handle off if it won't go through the "mouse hole."