I have a nice 12" ProForm electric (pusher or puller, curved blades are reversible) fan, was used for about 200 miles until I went with their 15" shrouded fan on the rear instead. Cost me almost $90 from Tognotti's, I'll sell for $60 shipped free. Paypal only. Thanks! Pic for example, looks about the same. Runs quiet and smooth, low amp draw.