big_greg, this is the one I'm using, I leave it on low, seems to do a good job and it's very quiet.
https://www.acinfinity.com/component-fan-systems/aircom-s6-receiver-and-av-component-cooling-blower-...
https://www.acinfinity.com/component-fan-systems/aircom-s6-receiver-and-av-component-cooling-blower-...