I had the same problem with CLC about a proposed trimaran they talked about.
Must not of had enough interest for them to feel it was worth the effort to make the boat, refine the design, and make a set of building directions.

Do you think you could start with a surf ski and come up with the outrigger?

I've seen articles about building a surfski from this guy: http://www.thomassondesign.com/en/catalog/my-kayaks/black-pearl