this is a custom pella door i can not identify this seal i had sent you an email to help at swisco.com
many thanks Mike
Bob from SWISCO responded:
November 25, 2020
Hey Mike. We don't have an exact match for this door sweep, but check out our 58-176 or 58-186. This sweep type wraps around the bottom of the door and mounts with screws to one side. Take a look and see if you think this type could work for you.