Ok, neither of my two local plumbers merchants can help me identify a replacement button for this mechanism. There are no printed names on the button or mechanism. The button has lost one half of its cover and the spring is very weak and gets stuck so it needs replacing. Tried a few bathroom spares websites but there are so many different push buttons. Couldn't see anything similar. Does anyone know a manufacturer's name or a name for this type of connection to a button so I could get a generic replacement ? Thanks.