Dennis: Where do you live?
There are a few people in Holland who are trying to grow the Dragoon class. IMHO the Dragoon is a great cat for young sailors and adults alike.
What they do is they get a parent to sail with their kid against other kids and when they reach a certain level or age the parent stops and the kids sail with each other.
(I can PM you with more info if you want).

If you are looking for a small learner cat, there is a Hobie Advance for sale now:
http://watersport.marktplaats.nl/catamarans/157217930-hobie-cat-advance-2006.html

edit:
The word "opti-killer" is used quite often, mosly in reference to this little boat:
http://www.openbic.com/