I would find a used fan local or on the web and use it with a new thermal viscous drive. I was just at the Monster Mopar swap meet over the weekend and there must have been a dozen fans at the small swap meet they have so they are out there used.

Gus beer

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60