This is the fan. You will also need an adapter be be able to fit this fan in the same spot as the existing fan.
Vantec Tornado 80mm Ball Bearing High Speed Case Fan TD8038H at TigerDirect.com
I will post a picture once I get it installed.
BTW the unit had the temperature down to 25 degrees with the compressor evap fan and condenser fan running constantly for a little over an hour. I think this will end up working.