I know there are plans for the Unicorn floating around somewhere. I used to have the name and number of a guy in Alberta that built a Unicorn every winter in his garage until all his friends owned them and they had a nice fleet. But I have lost the information, and I don't know if he is still even around on this Earth, because he was getting up there when I met him at least 10 years ago. (He had to stop building the boats because he developed an allergy to epoxy resin, which seems to be a fairly common problem.)

The Unicorn A-Class was competing with the Tornado back in the late 1960's for the Olympic Class designation.

And, as others have said in other threads, the Gougeon Bros. should have plans for A-Class cats. Website is http://www.gougeon.com