Cooling waterwheel fans [like aero7]

does anyone know where you can buy a waterwheel style fan like the aero7, but in a standard size? [such as 80 or 90mm square]. for me, this would be preferrable. getting rid of the blind-spot and having lots of air flow [90mm] could have great benefits. combining such a fan with the thermalright sp-97 could be circumstance for great cooling with low noise.

email me back, jack