I need to add a charge pump to an existing machine to kill machine movements and the spindle starting when the computer is off. Ideally it would just be a passthrough board with a db25 male on one end and a female on the other that would just enable output when Mach sends its signal on pin 1 or whatever the default is.

Has anybody seen such a beast? If so, where? If I can't find one that exactly meets my needs, what are my options for charge pumps without having to purchase a new BOB?