This probably doesn't help you too much without being able to see them in person, but the metal brackets are simple pressed steel with the rubber seals stapled to them. They wouldn't be too difficult to bend into shape if you had guide to go off. Attached is a blow-up from one of the seal kits. The sharpest angles are the ones listed as #4 & #5. You can probably gin something up with a little trial and error. I don't have ready access to my car at the moment or I would try to post a close-up photo. Maybe someone else who sees this can provide better detail. Good luck.
'67 GTO/Signet Gold over Parchment/Pontiac Built