Unlimited products (
www.UP22.com) here in California has a pretty good selection of Duster hoods, starting at less than $300 for a flat hood, six pack and cowl scoops of various heights integrated available.
You will find BAD reviews for their stuff, but they are mostly from the companies previous owners, new owners, new stuff is supposed to be much better.
I can NOT give a personal recommendation, I haven't used any of their stuff, they don't make anything for my 62 Savoy or Opel GT. Got a scoop on the Savoy, no hood on the opel.
But if I wanted something from them, I could just go to their shop, pick it up and inspect it, and carry it home , avoiding crating and shipping charges.
I would look for somebody local to you, so that you might be able to do the same thing..
IF YOU DO buy something from California or Pennsylvania, make sure it is insured, and inspect the part before you sign anything from the delivery company.