I'm gonna guess that you're not sure if the TPMS sensors are aftermarket or if they're OEM Mitsubishi.
If they're aftermarket, a tire shop may be able to register the sensors to your car, since the Lancer also uses a 315MHz TPMS sensor. However, if the sensors are OEM Mitsubishi, you're probably SOL because I don't think there's a way to register Mitsubishi sensors to a Mazda.