I have a 2005 Polaris Sportsman 500 HO that needs a new Sure Power Box (Electronic Control Unit). The part number is 4011085. Dealer says they cannot get this part any longer. I have checked several places and it is out of stock. I found one place that will rebuild my part, however they cannot get the Mosfet part to repair the fan function. Is anyone aware of any work-around? The dealer is offering to install a manual switch to operate the fan.