Try http://www.rowvirusboats.com/sailing

They make a nice 21 foot tri but I doubt it will fly the center hull with those tiny ama's on it. I would love to strap two Inter 20 hulls to that thing and replace the mast/sails with the Inter 20 mast and sail plan, then I'll bet you could fly the center hull.

I think way back about 20 years ago, the French had a Formula 28 racing Tri class (I've seen some pictures). This was before they went all the way to the 60 footers. I would love to get my hands on one of those old 28's.