Here in Brazil, original speakers are very expensive, so we get japan type speakers and mics and "paint" them with liquid eletrical tape ( http://www.plastidip.com/industrial_solutions/Liquid_Tape_-_Electri... ) its more cost effective then buying originals. Dont forget to let it dry really good before puting on the helmet.
Luiz right on man todays new divers has seemed to miss this basic knowledge and would rather pay what $220. for the ones they use today when they can get the otherspeakers at the same divers supply an/or radio shack just be sure to get the water proof ones. With the money you save you can buy your wh*** dive crew drinks at the bar and you'll be the rock star. Rock on Luiz!