Harold,
Hi. Other than finding an original which is hard, expensive, and the one's I've seen look like they need a lot of work, you can check out 1) Thornton Reproductions. They make a high quality hood, metal frame, and I think around $3000. 2) The Parts Place where I got mine is a good hood, not quite the level of a Thornton although I've heard that Thornton makes them for the Parts Place. Not sure if this is true. My hood fit well and is also a metal frame. It ran about $1500. 3) There are others that are cheaper but you get what you pay for. They're usually all fiberglass except for a metal brace where the hood mounts. They may also not have a hood latch since no metal frame.
My car is a 70 but I'd assume they have a 71 hood as well. They are different.
Good luck, Gary