Sliding HOUSEBOAT door handle?

A quick learner from New Jersey says:
I live down in North Wildwood New Jersey and I'm restoring a 1969 Nautaline Houseboat. I'm trying to find a keyed locking door handle for the rear sliding window/door. The original handle is missing.

The door is just shy of an inch thick. Approximately 15/16 of an inch.
The holes are 5 1/2 inches apart.

Can you guys possibly help me?
User submitted photos of door hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I'm afraid we couldn't find a handle with a 5-1/2" hole center spacing. I would suggest considering something like our 82-005, along with the 82-306 keyed outside handle. This is surface mounted hardware that I believe you can retrofit it to your door, though you will have to redrill holes for the 4-15/16" spacing. It comes with a new keeper.
A professional from California says:
You may want to look at 89-032.
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