Just tacking this on here as it seems a logical place.
I had been looking for a Hobby Engine Southampton tug, but they seemed to be hard to find - not in stock in many places and a bit pricey when found - circa £135 with delivery.
However, I stumbled onto the "ARCTIC Aqua Rider 703 - Southampton" which appears to be the same beast. Whether it's a clone or someone else (Arctic?) has bought the production I don't know. I just got one via 'Fishpond.co.uk' * for £102 delivered. And it even works, though not tried it in water yet.
( * Reviews I've seen of Fishpond aren't exactly glowing (they are actually just an 'agency') but my order arrived 2 weeks early, so quite pleased. Fishpond said it was from a UK supplier, but there was nothing in or on the box to say who it was.)