Hi Kirk,
I've used the Aircraft Door Seals material on a C172 and C172RG. I purchased it from Aircraft Spruce. The door gasket was 1/2 inch square. The baggage door gasket was 1/2 inch wide by 1/4 inch deep. I think it was made from TPV rubber.
The airplane doors had been leaking for a long time and the previous owners had tried lots of things to seal them, including domestic house weather-stripping, and masking tape! Several hours of work was required to remove the old seal and clean the old adhesive from the door. The new seals weren't cheap. They were easy to install, but after installation, some areas of the door, especially the corners, continued to leak air. Shortly after installation on the baggage door I noticed the seal was abraded from vibration, even on protected areas next to the hinge.
In summary, the seals cost a lot of money and effort, and didn't prevent air leaks. I think your success with a seal will depend on how closely your door and door frame conforms to the original dimensions, rather than what you buy.
I think silicone or silicone foam is a better choice of material for door seals. It would be interesting to contact
Brown Aircraft Supply to see what they could offer you.
I recently bought window seals for a C337H from
Commodore Aerospace (Don Neiser), but don't plan to install them until the fall. Don may be able to help you.
Good luck, and please post to let us know what you buy and how it goes.