Where can I find a 36 “Outdoor fan?

Hi,
I’ve found sites that sell just such fans.
Try sites like a Tractor Supply place, industrial warehouse supply,
even an agriculture supply sites.
It hasn’t been since this last summer I found sites, but the fans that were offered are of the type that one uses to move air in large volumes such as in barns, factories, etc.

These fans even had wheels mounted on them for mobility.
Some were belt drive, and others were direct drive.

Hope this helps,
Dave