Probably the best way to go about doing this if you want the exact boats is to message the group. I don't know about GBHL, but DCHL is A+ at responding to queries.
Boats probably aren't all that bad to build out of plasticard. Make a nice oval base and then use some plastic cement to adhere your sides to it in a nice boaty shape. You can also use cereal boxes and masking tape for prototypes. If you like the shape, you can take it apart and have a template.
There's some kind of pirate miniatures game that apparently has boat-building instructions in its manual. I'm not sure what it's called, but I want to get my hands on it.
