I got them from the local model shop where I have bought most of my wood and hardware from.
They have quite a large dolls house section and sell these 1/12th figures. £4.95 each, 50p for the dog. I did not want to spend a lot on them, and £15 odd so far is quite a bit. But a young child today spotted the wee dog, so that makes it worthwhile I think. I maybe need one more for the front. There was talk of a young bikini'd lady, but, it is Scotland after all. Fully Souwestered more probably.
I agree on the size. They are just 'off' being correct, but the boat doesn't have the bulk of the boiler or funnel or canopy (in fact, that is why the mast was added, to give it some vertical bulk) so the figures sort of work ... just.
I was planning a pennant ( for the 'bulk') but printing online pages from Model Boats magazine has emptied the colour cartridge.

It was a bit windier today, and there was a couple of times a fast little fire boat was out and about creating quite a wake (faintly visible in some photos) but the Choup remained stable and dry as best I could tell. Inadvertently nudging the throttle lever to full astern is not a good idea though. Some water came in the servo steering arm slot.
Due to the electric motor at full chat it was quite a bit of cavitation and, it turns much better one way than the other, probably due to propeller handedness.
However, all in all, very happy with it. Cheers for the support, and we are looking forward to seeing yours on the water ... no doubt swiftly followed by calls for our Choup to go steam

It does need some brass fittings, cleats and stuff, but I am loathe to drill holes in the nice deck.