If it's not one thing it's another. I finally took the motor out of the box and the plastic shroud over the fan is broken in two places where it screws in. This is probably due to rough handling because of the way it's packed, the different foam pieces can shift, the shroud is entirely enclosed in one piece of foam while several other pieces of foam surround the motor. I probably did this recently after removing parts and packing that would allow the motor to shift in the box.
I kind of doubt this is service item for sale, so I'm going to go ahead and patch in a piece that broke out, fill a crack, and then use washers where the screw attach points are broken. I'm thinking of using silicone because I don't know what kind of plastic it's made of and it will certainly hold it together and can take high temperatures. I won't try to install the motor until Monday though, I'll call SS just to see if it's an available part.
By Grabthar's hammer, by the suns of Worvan, I will get this upgrade completed!