Originally Posted by the octopus
Fans are available for about $35 on eBay right now. Same fan: 12v SPAL 4" push.
The fan that I have spec'd is the PULL fan, not the PUSH. If fit with the harness that I have been making the PUSH fan will blow through the radiator back to front. It may be possible to change the direction of rotation of this fan to make it a PULL type, however I do not know if this will work well or for very long.