Spoke with my guy in Ft. Lauderdale, and he said to contact the Marine Industry Assn. of South Florida (954) 524-2733. He seems to remember two private outfits that did it in the past, and he's fairly certain that one of them is still in business. Their names were (no kidding here) "Waste Busters," and the other one was called, "The Turd Tug." Hey, I didn't make up these names... don't anybody be offended by their grossness - I'm just passing it along as it was relayed to me.