This is the fan and fan motor "blower" assembly from my retired vintage 1980s Jenn-Air 88370 downdraft range. It was working fine when the range was taken out of service, and though it's from an 88370 it should fit several other models.
Check your specifications to see if it'll work for yours! This listing includes all of the parts shown in the pics - motor, housing, and fan.
Please note, though, that the wires were clipped rather than pulled from the junction box, so you may need to splice a little. See the closeup in the pics.
You may also want to clean it up a little. The item "Fan & Fan Motor Blower for Vintage 1980s Jenn-Air 88370 Downdraft Range & Others" is in sale since Saturday, August 20, 2016. This item is in the category "Home & Garden\Major Appliances\Ranges & Cooking Appliances\Parts & Accessories".The seller is "foxxboroughboutique" and is located in Johnson City, Tennessee. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, PH, SG, to Switzerland, NO, SA, AE, QA, KW, BH, HR, MY.