Check w/ Glasstek. They only show a stock flat hood on their website when you look up 63-64 dodge, but they will put whatever type of scoop on it that you want. You won't find any nicer fiberglass body parts than Glasstek.
I would check with Unlimited also, 877-735-7722. The new owner has made this one of the best fiberglass body part company in the country now They make really good fitting and finish parts now, race or street weights