A quick learner from Santa Rosa Beach, Florida says:
February 19, 2019
The middle strip cross section in the first photo (0600) us shown installed on the side casement, perhaps where the doors meet when closed.
Paul from SWISCO responded:
February 21, 2019
Hmm..there is a possibility we may be able to locate or offer a substitute weatherstrip for you. Could you get back to us with the measurements and dimensions you are in need of?