I'm having trouble sourcing a 1U cooler for an x10 board which fits. It has to be narrow (I believe). I ordered a Dynatron 2011 cooler that said it fits narrow ILMs, but it was obivously square. It was much larger than the rectangle mounting pattern my board has. I need it to fit a 1U chassis. Ideally, it'd be an active cooler to keep the fans fron ramping up and waking up the entire neighbordhood.