Need to pick ur brains

Is there a way to set a limit for how much of a certain subsystem can be built? Right now i only want one Siege cannon for the somtaaw fleet cause i got it set up so the Kuun lan is the shipyard and the faal corum the default command ship. And only the kuun lan can build the cannon, 2 cannons gives the somtaaw fleet too much power to turn the tide.