I used this fan from Radio Shack. It is more than you need.

http://www.radioshack.com/product/in...ductId=2211703

I used a simple AC/DC charger for charging nimh batteries like this one- available at most any hobby store..... An old phone charger would work, but most are not 12v and your fan would run 1/2 speed at most.

http://hangar-9.com/Products/Default.aspx?ProdID=HAN103

I wired the (+) output from AC/DC out to a rheostat. I got the rheostat at Radio Shack....

http://www.radioshack.com/search/ind...=rheostat&sr=1

I only run the fan at about 1/2 speed on the rheostat and it is more than enough airflow.

Power strip where the compressor was. Plugged into it is the stock 120v light that was inside, my Herpstat 1 and the AC/DC converter. That powerstrip is plugged into a nice surge protector. Rheostat is on the bottom left. It fit right where the stock temp controller was for the wine cooler.