Well, I shall be checking out all those ASAP, so thanks once again chaps. I doubt very much I'd have found those without your help.
Just a couple of points I should have made clear. One is that I'm into slow-speed sailing on a relatively small pond, and t'other is that it doesn't have to be scale (or indeed prototypical if it's fun to sail).
The 22" limit is a definite limit, by the way, on account of anything longer simply won't fit into my Boat Transport Module a.k.a. the plastic crate on the trailer behind my bike ...