Here's a link to a 63-66 reproduction. I think the only place to find an original is Ebay or a local wrecking yard. I'm not sure when they changed, but the original 1960 style was a metal cylinder that wrapped around the fan. I think this style may have lasted until 62 but I'm not sure.
http://www.classicparts.com/1963-66-Fan-Shroud-V8/productinfo/78%2D921/
