Ultrasound Cleaning

For maintenance purposes, I would like to construct an ultrasound cleaning tank. Preferably an encapsulated ultrasound transducer and generator that could be used in an old solvent cleaning tank which now should not be used. From reading a little about the subject, its application would find a wide use as a clean and environmentally friendly solution in many industrial and domestic applications. Is it feasable and cost effective to build a generator and an encapsulated transducer, and are there any websites to go to to find out more?