i am afraid you will have to go fiberglass if you want a cowl hood ,you would think the sheet metal guys would have come up with somthing by now ,the gm guys have it coverd whats up mustang sheet metal guys?
A good fabricator could probably modify an OE hood....
Why no sheet metal hoods? You need to make stamping dies (very expensive) and know that you are going to have to make a crapload of hoods to make it pay. Laying up fiberglass on a mold is a much cheaper alternative.