The skimmer is old but still works well so I'm trying to hold onto it, but the magnet in the impeller wheel is swollen. Vertex skimmer IN-80/IN-100 420lph 20w. I measured the impeller. Magnet is 3/4" diameter; 1.5" magnet length; 2.5" end of needle wheel-end of magnet shaft. I know the company has been out of business for a while but someone has to make an impeller this size somewhere out there. All google results haven't given me the dimensions. I'll continue to look in the meantime. Thanks in advance to anyone can steer me in the right location!