Pella Retracing Sliding Screen Door

Sir/Ma'am, I'd appreciate any insight on the attached photo parts. My Bella sliding retractable screen door no longer latches shut, in the fully retracted position. I suspect the part in IMG_1384 latches into IMG_1387. In other words, the "small c" which is attached to the door latches into the "big C" which is attached to the door frame.

And the "big C" holds the "small c" in place through friction. Except the plastic in both parts may be too worn to hold it in place, through friction.

Can you tell me where to find the part the customer has pictured in their first picture? The part that has a "c" on each end of it.
Thanks!