I can't find anything very close. Looking for something like a light dimmer switch, or an up-down spinner with an option to provide an image. Or some way to use a simple button and decode the pointer release point to decide if it was above or below the center line. I could stack two buttons vertically, but I think the result would look funny if any click animation is needed. I'm trying to simulate an old 8080 microcomputer front panel, which uses up-down momentary contact paddle buttons to do certain complementary actions. IMSAI 8080 Front Panel image snippet
Basic Button does not appear to provide a hit (release) location. SplitButton's second half displays a flyover. ToggleSwitch is a switch not a button - always engaged in one state or the other. ToggleButton is really another switch. Up-Down appears to refer to old WIN16 API controls. Spinner appears to be an optional decoration/accessory for a NumberBox.