1952-54 Cars have the hood hinges attached to the duct. The seals are round on one side and have a "D" shape on the other... made of rubber and a real b***h to install.....
DC has them but they are junk have been for a lot of years.better to make your own from a small inner tube.biggest problem may be finding a good quality tube.motorcycle may be your best bet
I used a piece of inner tube from , I think, a small trailer tire. Possibly even a wheel barrow tire. It was a good enough fit for me. Easy to work with and the price was right.