Where to get correct rad. hose?

you would probably be lucky to just find a molded hose that fits correctly,
i suspect that finding a correct nos hose would be like finding a needle in a haystack. would you really want to run a 40 year old hose anyway?
if so try the e-bay dealers that specialize in nos mopar parts.
you might also try one of the mopar restoration parts dealers
(just in case you are lucky) Doug