Kevin, that's a newer style, or at least different style, lock than is on my '99. Our latch/lock looks like the upper part, but there is a built-in deadlock inside, and no separate deadlock below. Just one lock cylinder operates the lock. Our trailer has been used very little, and can't be suffering from much wear. I think we are going to have to disable the deadlock, or find some way to positively hold it open.
That link is good, though, as we have a 2006 28 CCD with that lock, and we are going to get Inland's fix right away.