Mine went bad at 15k pulled by Quinn Cat in Calif. sent out for repairs. Shop said better to get a new Steel and Copper because the fix on Aluminum radiator will not last, so they got one from Radiator Supply House Sweet Home, Oregon.
http://www.radiatorsupplyhouse.com/
http://www.radiatorsupplyhouse.com/ads/radsupplyflyer12-08.pdf
Total cost with (coolant flush-Cat EC-1 Rated coolant)$5400
On a 400 Cat with side radiator. Mine looks like you would have to get it up high to get everything out the bottom.
JR