There is an and electric fan on the V-6 Tarus and one on the Grand Cherokee, both from the '90s, that are around 2000cfm and can be made to work fairly easily. Either one should keep your engine cool, even in traffic. I would look for some other reason for the "hot running." BTW, did you get all the air out of your cooling system the last time you had it open?
best wishes,
Les
