68 gts 340 shroud needed

That shroud ( part number ends with 614 ) has been reproduced for about 4 years now. They got a bad reputation for melting into the fan early on. That fault may be corrected today.
And yes OEM is a rare piece. It was available only in performance and a/c equipped cars. When the bisquit type motor support would break the fan would eat the shroud. Good luck