Some of the railroad model suppliers have what here is called G scale (garden railroading) and in the neighborhood of 1/22 scale. Some are done up in working attire and others in civies, some are also sitting down. Down the model car truck section of the well supplied hobby shop. You will sometimes find the following or some variation of them. They are glue together so some adjustment of pose or posture can be done. or you can use them as base models to adjust dress, and posture and then re cast them, if you need multiples.
The one is by Taymia, and the fire helmets are separate so you don't have to use them on the Revell. They are a number of years old, and may no longer be available. But between the military model kits with the extra troops, and the small plastic solders and others you should find enough to populate your ship.
The last three are from a Fisher Price play toy car set. Found at a yard sale. It is always helpful to have a same size scale reference card with you so you can quickly compare the size in the bag or on the table with what you are longing for.
glen,US* Great Lakes region