A good, used original Harrison 4-core with the botton tank cooler, is a good replacement. I just had one re-cored, to stay with original equipment and it was close to $400.00. I have only found one supplier, that has a true-fit radiator. I found them at a swap meet and they were out of St. Louis, MO. I don't recall their name, but I purchased a few of their units, since they were so close to factory-correct. I have found the quality, fit, finish and configuration of the many aftermarket suppliers, to be average, at best.
We may have one, but I will have to check my inventory, to be sure.