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has one on their ebay page listed as New. Might give you a better deal than that price.
"NOS HEMTT RADIATOR M977, M978, M983, M984, M984A1, M985 Radiator 01-56 – SECO Parts and Equipment" https://secoparts.net/products/nos-hemtt-radiator-m977-m978-m983-m984-m984a1-m985-radiator-01-562-7182