Find a replacement impeller fan

Hi guys,

I have the Bissell SpotClean 3698F, the impeller fan on the bottom of the motor is damaged & I can't find a part number for it. I did an image search and found other aluminium impeller fans that look almost exactly like this one but the fins are facing a different direction. All impellers I've seen seem to have the fins facing the opposite direction
Does anyone know where I can find a replacement impeller fan?