Identifying locking shoe for jamb liner for lower sash in double-hung window

One locking shoe broke off in my lower sash channel in a double-hung window (the other is functional, so the lower window only partially stays open). I am not sure of the window manufacturer but am eager to order a replacement part so as to not have my window contractor have to replace the whole thing! These are pictures of the metal piece from the locking shoe, stamped numbers from the channel cover, and a few pictures from the (functional) left sash channel.