Here are five images that we took by un-mounting the weather stripping. There is a part missing in it, it is a flap that is about a 1/4 of an inch and it is curved. Most of this curved flap is gone in the pieces we have. See image #4, here you can see from one side this curved piece.
Image #4 has this curved flap as it is inside the house and the most protected from the elements.
Image #1, you can see that the weatherstripping covers a piece of wood that is one inch thick. 1/4 of that wood is exposed, that 1/4 inch goes inside the molding of the frame of the patio door. See # 3. We would be reusing the wood inside the weather stripping.
I could do a drawing of what the profile might look like when the weather stripping is complete. Let me know if that would be helpful to you.
Thank you for your patience and help in identifying this piece.
I think we will need two pieces 78 inches long and one for the top across that is 69.5 inches long.
Thank you, Veronica
PS: Let me know that you can see all 5 images. Thank you