I have an island cooktop stove with an exhaust fan mounted on my roof through a series of ducts. The brand is TradeWind and model # is VR1000. I need to replace the squirrel cage blower fan but have not been able to locate a replacement. It appears the company has gone out of business. The ID is 10”, with 4” height and 1 5/8 outside hub with ½” center. Can you guys recommend a source?