Replace Lock in Sliding Door

My first thought was our 82-008, which looks strikingly similar to yours, but then I noticed that your thumb actuator is a little lower than ours. This makes me wonder if the locking tooth is also lower, which would pretty much render the 82-008 inoperable. Look it over and let me know if my hunch is correct. If I'm wrong, then great. But if I'm right, let me know and we'll try to find something better.