need a NC Tactile pushbutton 6mm square

I needed a NC Tactile pushbutton in a project, I layed the PCB design and sent it to the FAB House and then I found that its very hard for them to find the Normal closed Tactile push-button.I needed a push-button that was normally closed (NC) and would open when pushed. Almost every tactile push-button is normally open (NO) and closed when pushed.So, does anyone know of a standard-width, compact-height, through-hole, tactile push-button in a normally closed state? I am using 6mm square tactile Push-button footprint.
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