I was able to "update" the blower motor in the current wagon restoration with success. I took the old motor to the parts shop and after much searching we found one that looked close enough...it was for a Frieghtliner Semi! ($100) The mounting holes were 2 mm more narrow so I put a washer on the outside to hide the oval hole. The stock plastic block that has all the wire connections was reattached so it looks stock except for the washers. (I may have to paint them black too, just have to look at it some more to decide). The motor had the option of being a three speed, but I just capped the low speed connection and it is med and high. It is quite a strange feeling to feel a breeze from the defrost vents in an amazon, and the rear heater ducts also produce a breeze.
Can't wait for the first frost to test it and the new heater core out.

-Erik