I went delving into the thumbs collection, and I found a couple maps that have a similar design to my mockup.

Note: I was going to just link to the images, but the preview showed them at fullsize, instead of thumbed. Instead, I'm posting to their respective threads.

First there is this one, Port Saber. I like it, but I feel that the cove is a bit too round, doesn't seem quite that natural. The second one I found, which I favor more, is this: The Port of Marascar.

I'd kinda like to use one of these as a base to build from, but I've no idea on the scale or what the population should be like, for those maps.