Historically I've run a Modine 2041, or equivalent, 3-row core radiator. The last time I went to the radiator shop the 2041 equal was stupid money. They sold me a 2-row core radiator that was almost as thick as the 2041. The only difference was the 2-rows were in the same space as the 3-rows. The part number might have been 147CBR, $260.