A:
I don't know about fit for your application, but I do have these on my boat and they are keyed-alike. They were original equipment so I don't know how to order.
I would not consider these SECURE as the only lock, they can be broken easily, but to lock while at the marina for lunch they are adaquate. I would still recommend a lock-bar of some kind, or standard hasp and padlock for overnight security.