First a definition problem, semantics are important in engineering, a TRANSDUCER is usually device which coverts a physical value as for instance displacement in a reference energy used to measure the physical value for instance electric tension or current, an ACTUATOR is a device which does the change the other way.

What you try to find are ACTUATORS. For small displacements and LOW frequencies you could use magnetic actuators which have a higher density of force / area than coil voice actuators. Voice coil actuators are mostly used for high frequencies (and low if required) because of their low inertia which is in high frequencies a major problem.

The mass you will deal with is if I understood it right about 260 kg. Now the force you should have at your disposal depends on the amplitude you want to reach in your frequency domain.