I recently saw an ad for a low profile dryer vent kit but lost the source (too many damn catalogs!).My situation calls for dryer to vent behind copper water lines that are about 2 inches from concrete foundation wall. Typical plastic dryer vent pipe gets squeezed behind water lines and restricts air flow and causes buildup of lint in line. Also keeps falling off dryer vent pipe in spite of stupid nylon clamps provided with standard vent kit from (dare I say it), Sears! The unit I saw is sheet metal with 4" port that connects to dryer but transitions to about 6" by 2" duct that will connect to standard outside vent kit. Anyone that has seen or installed this unit, please tell me where I can get it. Thanks!