AT SS Tour paddle parts needed

Purchased a kayak this evening that had an AT SS Tour paddle but the Ferrule lock is missing parts and the paddle does not lock into position.

any help in letting me know what I need to fix this paddle? It seems as if the Ferrule lock tab is missing.

AT is now owned by another company.
Perhaps someone on the site will pitch in with the name, which escapes me at the moment. CRS kicked in.

Hopefully, you could find the part that way.