You'll need to know the width of the radiator. Either 22" for non-factory a/c cars or 26" for factory a/c cars . . . or that's usually the situation as to radiator sizes in Chrysler products.
Does the car currently have a direct-drive fan or a fan clutch?
There was a 65 two pc shroud for sale on Facebook just the other day. I believe it was for sale by a member here. I think possibly it was @azblackhemi Chris from Arizona?
Thanks for the help comments guys. Having now done the research i should have done before (!) it seems only the AC cars had fan shrouds, i had always assumed mine was missing, (dont have any other cars here to compare to) so i'll just leave as is. Next time i'll check first
Yes, if your car didn't originally have AC, trailer tow or high altitude cooling package, then you did not get a shroud unless you special ordered it - typically installed at the dealer or at least as an over the counter at the dealership parts counter. It's listening in the part's book as an accessory/repair package.